Right, I made more hidden assumptions, I was not thinking of first-timers. If legalized, this could be better controlled, similar to alcohol. The information could also be more honest.

Of course there are also alcohol first-timers who get abolutely shit-faced, that's a really bad trip as well. Probably also some who die of alcohol poisoning.

I'm curious, why did you say "dire (psychological) consequences", what do you mean by that?