He was smoking a lot of weed leading up to and during the psychosis.
Ended up in psychiatric ward for a month, which was followed by a couple of years of depression/introspection/therapy, but is now doing great with lithium.
It’s rather a shedding off of an inconvenience for those that have no (direct) problems of functioning (eg risk of developing addiction, psychosis, etc) at the heavy costs payed by those that are more vulnerable.
While that framing might change the aperture for people to support decriminalization efforts, "helping people who have addiction means social progress" is the greater good here.
Unfortunately, at least from a USian perspective, we only got so far as the decriminalizing part, and we did it while actually cutting a lot of the social services, health care access, and safety net that actually help people with addiction function in society.
I had a parent with schizophrenia. I can tell you what a privilege it is to have my cannabis use be the primary risk factor I have to worry about, and not the financial stress and eventual homelessness, untreated health issues, and lack of mental health support my father faced.
And what about those who have a "direct problem of functioning" (like anxiety, depression, ptsd, whatever) and get no real help from the medical profession, but do get help from the drugs?