> Personally, I believe that any mind expansion or mood change possible with street drugs is also possible by other non-drug means - e.g., fasting, meditation, and physical activity. There is long history of such.
Yes. This training is a bit easier if you know what you're looking for, though. (In a "now I know what I can give my consciousness permission to do" kind of way.)
AFAICT, even the proponents of psychoactive substances for mental health reasons don't say this is a pill that will fix your problem – it's possibly a way to make it easier to see things from a novel-to-you angle that will make it easier to do all the other stuff, like CBT, even if your current brain patterns try very hard to keep you in a routine that isn't healthy for you.