How do you know ? first hand experience ?
Right.. a daily user for about 2 years (along with various hallucinogens, but weed was the dope of choice).. mid 70s (and sporadically prior).
It destroyed a year of university.. by the time i quit i was paranoid, depressed, sedentary, goal less, solitary, apathetic and socially averse. I was becoming sloppy.. took little interest in grooming, diet, exercize and sports, or, intellectual pursuits. Those are all aspects of
neuroses.. but what scared me was that i was seeing clear signs of developing
psychoses, in myself and my fellow pot smokers.
It wasn't just me.. most of my friends quit about the same time i did and for the same reasons.. we didn't want to go through life in an isolated daze.
My advice for people who want to bury themselves in their parent's basement in a cloud of cannabis smoke is.. get a life.
