There are definitely real risks that need to be made known around pre existing mental conditions and psychedelic use. Those are appreciated.
But your thesis suggests that transformative experiences are unlikely to happen which from personal experience I can say is false. The impact of a breakthrough psychedelic experience can be profoundly positive especially for those starting from a less enlightened place.
BUT everyone knows that guy who has the “I’m Jesus” moment instead of “we’re all Jesus” and it’s usually easy to see it coming in retrospect.