Why we have a moral responsibility not to criticize praying

We absolutely have the moral responsibility to criticize praying if it's to/for/about the wrong thing. And frankly, we should criticize embracing superstition and ignorance. The only effect prayer has on anyone is psychological. The same effect could be achieved by acknowledging what's actually going on, rather than attributing the positive effects on some magical, supernatural entity that supposedly cares about your little life in the grand scheme of things. Religion is really a form of self-centered narcissism. It's essentially the idea that you are so "important" that a supernatural, created of all things should invest special interest in the things you personally find important.