Curiosity got the better of me so I read the whole thing. Thanks for backing up the point that recreational Marijuana use isn't an issue. The only data in that report that suggests an issue is high level use in people with a pre existing defect. Recreational use implies occasional/weekend use.Just one site. It is a major problem. I suggest that you widen your reading. And yes, I tried it years ago and it did not have much effect on me - I have a very high resistance to many drugs.
Several studies have linked marijuana use to increased risk for psychiatric disorders, including psychosis (schizophrenia), depression, anxiety, and substance use disorders, but whether and to what extent it actually causes these conditions is not always easy to determine.nida.nih.gov
Just for a bit of balance.
With the launch of JWU's new Cannabis Entrepreneurship program, we're exploring the research around the health benefits of CBD, a component of the cannabis plant.
Legalise it I say. I won't be a user either way by personal choice, but I think those that want to partake should be able to. A minority of people will find a way to f**k themselves up on it, as they do with alcohol, donuts, chips, cake etc etc etc. Darwins Law needs to come into play at some point.