Sorry mate, don't agree with a word of that. I have experience of the type of psychosis you speak of, (not with myself..) and I know that only a certain % of people are susceptible to it. Those most likely affected are those in society who are likely to be predisposed to a form of mental illness. Drug use merely acts as a trigger that activates the underlying illness. Alcohol can & does activate these same triggers in certain individuals, (again speaking though experience) often triggering paranoia, depression and a whole host of other mental issues.
I bow down to your mentalness mal