Capitalism has a deep-seated taboo against taking recreational drugs. So strong is the taboo they will ruin your life and exile you from mainstream society for doing something recreational.
This is changing a bit as the scientists tell them there is basically no reason for this. But the scientists meet with resistance from entrenched cops, judges, lawyers, who are very 
about it.
What’s the materialist explanation for this moralistic taboo?
They seem to just as regularly lead to Joe Rogan types so I don’t think it’s appropriate to sum their effects up as purely positive for class consciousness or anything like that.
Note that I said “non-conformist and anti-authoritarian”, which is very different from “class conscious”. Joe Rogan is a Bernie Sanders supporter. You wouldn’t meet many authrights who like psychedelics.
The research says that the change is to do with ‘Openness’: https://www.livescience.com/16287-mushrooms-alter-personality-long-term.html
You mean to tell me Julius Evola just… was like that?