Thank you for this. I am neither an advocate nor against psychedelic use in therapy but as a person who has consumed these things in the past, my own experiences make me entirely skeptical of people who put on an advocacy hat around any particular chemical. Especially psychedelics like psilocybin which are extremely unpredictable.
When I was a teen a friend gave me an analogy that stuck with me. In much older computers (e.g. C64, Vic-20, etc), they'd behave "interestingly" when you mucked around with the physical circuit board or there was a fault. E.g. if something short circuited because a screw was loose in the board, or a cartridge was halfway in or a chip partially desocketed, etc. Characters would appear in random places, or the machine go through odd loops and so on. And to someone who didn't know how the machine worked, there could be a certain "magic" and a "pattern" to this. But clearly you'd be missing the point if you thought you had "enhanced" the machine this way.
LSD and psilocybin are kind of like that, but for your brain. They short circuit and alter pathways. In ways that can be entertaining but you're entirely missing the point if you try to assign a higher meaning to them.
Our brains are expert pattern-finding machines, and produce causes and reasons even when there are none. For some there may be value in the experience of altering the operation of your brain to get yourself out of a stuck pattern, I guess. But I am not sure the very random stochastic nature of the whole thing is ... medicinal.