I say yes. So what if we end up with lots of other bodies that we have to call planets. As long as their sizes are included in any discussion of them, then folks will know, for example, "oh, that's a small one, like Pluto." Or, "that's a medium sized rocky one like Earth or Mars." Etc. I'd say that if it is large enough to have gravity to make itself essentially spherical, then let it be a planet.
That's not necessary for most redditors, many of whom were not even in school yet when it was. They consider it one, astronomers be damned. But what about the dwarf planets in our solar system that are larger than Pluto.
As mentioned by another poster, the IAU definition is problematic and there is not even close to a consensus on whether Pluto should be a planet. In fact, it was originally to be designated a binary planet but that was switched at the last minute by the guy who was butthurt his rock didn't make planet status. Back in the 60s some thought Earth and the moon should be reclassified as a binary planet.