Supergirl - "Call to Action" - Humans with Powers

I don't think I've read any of the comics Agent Liberty appears in.

I was actually more in favor with Lena's position, and thought it was dumb how everyone else was basically ganging up on the opposite side; and completely ignoring the fact that, not only does at least two of them know there are humans with powers, but good ones. I mean, did no one writing that scene stop and remember that this series is tied to three other shows about superheroes? And I could have sworn the first time Barry met Kara there was mention of meta-humans being on her world.
The only thing I really disagreed with her on was her statement that "only the good ones" who wouldn't abuse their powers, would get them. Like, obviously you can't pick and choose who will or won't abuse their powers; or create a divide humanity.

Just the same, I think humans should absolutely be made stronger, more durable; and hell, if you can make them have the ability to fly, fucking do it. This whole "walking" thing is bullshit.
Even from the real world perspective where we don't have known extraterrestrials to compare ourselves too, to come up short; we're pretty puny, fail things that are easily broken. A slight variation in our surroundings, being too hot or too cold can kill us, give us the wrong mixture of gases in our air. Even the standard environment can kill some of us, whether it's standing outside too long under the sun; or ingesting something grown from the earth, like a peanut; to say nothing about all the non fatal ways our bodies might overreact to common things like pollen or dust. And then there are times when our own bodies betray us through any number of debilitating or fatal diseases.

The thing that kind of annoys me at times, primarily with the likes of Supergirl, is some idea that these aliens have "powers," as if it were magic; rather than a biological function. So if you take all of those qualities about humans above, and then some, and actually have an interstellar standard to compare to, where life beyond Earth is actually much heartier than the average human, to say nothing of certain abilities that may defy evolutionary reason, we're like little porcelain dolls compared to everyone else.

Sure, there are going to abuse any advances in human development; especially if there were to ever reach such fantastic developments as something like shooting lasers out of your eyes. I mean, we literally invented war. Think it's safe to say no other species on this planet has ever done that. But I don't think that should necessarily preclude humanity from developing beyond what it is now; or stop us from exploring what we could become. If we don't, I think we'll likely plateau, if we haven't already, and eventually die off.

The important thing here, I would say, is that in contrast to something like a gun, that has one distinct function, many of these types of enhancements would stand to have profound and far reaching, positive ramifications.  
The ability to manipulate an increase strength could cure diseases that affect muscle control, extended mobility to the aged, and allow humanity to travel among the stars, by reducing the negative effects of weightlessness, or providing humans the option to settle on planets with gravity different from what we developed in.

Honestly, I think your argument about enhanced intellect is more than a little weak; capacity speaks nothing to how it's molded, let alone used.  And if certain world leaders are proof of anything, you literally don't have to be a genius to maneuver yourself into a position do serious damage, predominantly caused by their lack of intelligence or rational think. If we should learn anything from the world today, or even the history of humanity on the whole as we know it, it should arguably be the need to improve out intelligence, rather than accept where we are.  Is there invariably going to be someone who will try to exploit that?  Maybe so, but better to have everyone else's wits sharpened and prepared to see that person for who they are, than not.  One might even argue that, that's why we are where we are now.  We're like, two generations away from watering our crops with Gaterade.
But there again, beyond the general upgrade for the populace, that same technology could invariably be applied to neurological issues that impair basic functions of the brain.  Goodbye Alzheimer, schizophrenia and all the rest.  Have a debilitating stroke?  We can rebuild it.
In my opinion, the positive potential far outweighs the negative on a great many of these types of enhancements.

And if we don't naturally enhance our intellect, or even if we do, I envision that humanity will eventually begin to integrate technology into their biology; combining their own minds with the computing ability of the latest and great devices our innovation has to offer.  Possibly even leading to a collective, technologically linked consciousness...
So whether biologically done or through a blending of biological and technological, It's arguably just a matter of time.  Personally I'd trust biological improvements over cybernetics - but that just may be my overt concern over humanity accidentally making the Borg or Cybermen real....

But can that really be said for most aliens?  I mean, in terms of Supergirl, it's pretty much whatever the writers decide; and the thing that often bugs me is that they basically treat aliens and their "powers" as if it were magic and arbitrary rules apply; especially when you get into something like the recent episode involving Parasite.  He arguably shouldn't have been able to just touch an alien and suck out the toy surprise without taking everything that made a given alien what they were.  It'd be like saying he could steal someone's eye color because it's a novelty color, without taking any variety of other biological traits that are at least tied in some way to how the eye color is expressed, if not a lot of other stuff too; a kidney, a big toe, maybe whatever funny shaped bits pass for reproductive organs on Rigel VII.  It's all part and parcel.

More to that end, it's entirely plausible that many of those races had done a bit of genetic tinkering at some point in their history.  If you develop the means to travel interstellarly, then you've probably had the scientific know how to edit your gnome; and the odds seem better than fair that at some point or another a civilization that has the technology is going to make some use of it, it's too tempting, to say nothing of all the above reason.  Then once it's done, those changes get passed on to subsequent generations.  Various iterations of Krypton even show varying degrees of this; all the way down to highly controlled conception of a child by artificially combing the DNA of the prospective parents, predetermining all of its traits, then growing it in a mechanical pod.  Their powers aren't strictly natural; they don't have the ability to fly or all of the other super abilities on their native planet; just the super-dense cellular structure needed to live on the heavier gravity of Krypton.  And so, so, so many Kryptons abuse those powers given half a chance, but it's only generally the fringe who would call for Clark or Kara's powers to be curtailed, on the off chance they would be inclined to follow suit.

Then you've got the likes of the two races of Martians.  I have serious doubts about an alien species with all of the incredible abilities J'Onn and his people have - from shape shifting, to telepathy, to phase shifting, flight, and digging into his conventional comic book history, heat vision - all came about through natural evolution and did not involve intentional manipulation.  And they've been at war with their sister race for centuries.