To make such a generalization from your experiences, I can only infer that you must've hung around with or known some real losers over the past three or four decades. Because what I've seen with my eyes over three decades, closing in on four, is not the same as yours.
So who's right and who's wrong?
Since booze is legal, pot legalization can’t be far off.
FWIW I agree with Buckeye McFrog. I have seen many careers in the military (70's-80's) and civilian world "self terminated" by pot use.