I have a theory that meditation and psychedelics do something similar in the brain. Meditation being much harder to achieve of course.

The changes in brain function occur in both, I think they both let you "move down paths of thought you normally wouldn't" if that makes any sense? There's studies for both that show similar changes in neuroplasticity, and I've heard from many psych users who later moved to just meditation and they seem to swear by not needing psychedelics