I have read articles more than once about a connection of young males, pot and schizophrenia. My best buddies younger Brother fits that description.
There is a far stronger statistical correlation of abusing cigarattes and schizophrenia but those studies are not biased enough to to falsely say cigarettes “may have caused” it.
See the actual twin study in my last post that tested true CAUSATION and found nothing changed in a twin from abusing cannabis. Yet even mild use of alcohol showed brain damage by 24
Same with my BIL. He wigged out at 16 yrs old after a serious bout of reefer reefing. Been on serious meds ever since.