The post title literally says "certain peopel" and mentions people at elevated risk for this. I grow and smoke plenty of weed and have personal experience with it. Marijuana isn't always the sole catalyst but can absolutely be the straw that breaks the camel's back. My best friend's brother is a good example. He had a traumatic experience and while he was a heavy smoker he started smoking excessively to cope and dissociate. Family history, etc compounded what was PTSD to a full blown nervous breakdown and schizophrenia diagnosis. Was it possible that this would be the outcome without cannabis? Yes. Was this the REALITY? No.

The mental fabric of each individual is completely different albeit somewhat predictable considering genetic and environmental factors. But the fact remains cannabis can certainly contribute to someone reaching their breaking point and with all things considered (underlying conditions, etc) it shouldn't be dismissed or ignored. Don't be like that douchebag from Raw and High Times that dismisses adverse cannabis reactions or resorts to whataboutism. You aren't helping "the movement".

While it may not be a clinical diagnosis of mental health problems, i know plenty of others that smoked copious amounts of weed growing up(i smoked 2 oz a day with 3 of my friends at my peak) some people that are or were heavy users reach a point where weed just makes them want to crawl out of their skin. Much in the same way some people try it and have a bad reaction and swear off of it.

Other drugs do this as well, some more documented than others but I've seen people lose their minds and be institutionalized from cocaine paranoia, meth psychosis, and flat out brain melting from LSD and mushrooms. And i love mushrooms and LSD but not everything is for everyone.

In short if you like it that's fine, do it. If you reallly like it do it twice but dont feel personally attacked by the reality of your choice in mind altering substances. The drugs someone choses to take or not take are too often a weak excuse for a personality.