At risk of asking a leading question: is it some idea that deep truth should come from reason rather than the noise and chaos of psychedelics? (I don't do them myself, but hold them in very high regard as a force in the world)
It's true that many people feel a deep connection to and understanding of consciousness during a psychedelics trip. Did they actually gain any knowledge about how their own brains work in the same way that a neuroscientist or ML expert might understand it? I contend that they did not, even if they feel that they did.
In a similar way a drunk might suddenly feel that he has the ability to dance. That's hardly a replacement for salsa classes.
Of course there are exceptions. Many brilliant people take psychedelics and credit them with breakthroughs in their fields, that can't be ignored. But you'll notice that its always _in their field_, ie they were already thinking about a problem and psychedelics offered them a new perspective.
i might feel a bit differently, but I think I hear where you're coming from: that it does a disservice to great people when we flippantly imply their greatness originates from simplistic things outside themselves (if I'm still way off, feel free to correct, but pls don't feel obligated to engage :) )