Human consumption of a naturally occurring mushroom (food) that happens to contain psilocybin is absolutely a natural occurrence and as a result has a history of human consumption older than wine.
> Human consumption of a naturally occurring mushroom (food) that happens to contain psilocybin is absolutely a natural occurrence
Same could be said about death cap mushrooms. Something being natural or even being occasionally ingested doesn't make it any better. Natural, occasionally ingested organisms can kill you on the spot.