The study only proves the known correlation that mentally ill are more likely to abuse substances.
The same exact correlation can be seen for tobacco use and mental illness. It only proves the mentally ill are more likely to use drugs and not care about their health. It does not prove the substance causes it.
There has not been a SINGLE before-after study or a SINGLE twin study showing ANY direct permanent changes from using pot in an individual. Neither in humans or animals.
Yet we allow people to consume alcohol without limit which is 100% guaranteed to rot EVERY cell in the body in EVERY individual
Just keep grasping at straws. True sign of someone trying to validate their excesses
Believe me. I lived through the 60s ...what I can remember of it. You’re better off with a few beers than that crap.