Funny enough, if he kept taking LSD and exploring his spirituality he could deal with the feelings of believing in science but being shaken by the possibility of the supernatural. That's actually pretty straightforward.
But he is choosing to close the book on it, and now is blaming the drug when really its himself. An act of ego if I've ever seen one.
You can't get similar experience anywhere else apart from years and years of mediation training, I'll believe when I hear somebody who experienced both and compared favorably. So far 0 persons. Look at what people are willing to do to get to Everest for example, and even reaching the top during multi-month expedition won't get you such a powerful experience (didn't do exactly that, but smaller similar stuff - very nice, but 'meh' compared to this).
Sure, I'll keep defending it, against prevalent ignorance and stupidity in the population. It was one of the best things that happened to me in my life (didn't have any for last 10 years maybe, the experience is still part of me and always will be).
That is ENTIRELY different from being predisposed to psychosis, which psychedelics can bring out.
And your logic can be reversed. Lives have been saved from giving extremely depressed people microdoses of LSD. But people like you would rather throw those people to the wayside and tell them they can't take the drug that works for them because you have some kind of personal agenda.
and really, their experience fundamentally sounds like a good thing. a new way of looking at, or experiencing the world was opened to them. yeah, it can be frightening, and that's why you need to put more work in, to accommodate it in your life.
I might be wrong, but I find these psilocybin experiments extremely enlightening as to why we as humans struggle so much with religious experience.
Did my suggestion make sense? I tried to word it as plainly as possible, but these are things we aren't used to discuss...