The down side is that it causes lung cancer at a higher rate than cigarettes, leads to psychosis and may promote Alzheimer’s.
Other than these reasons and that it funds organized crime, there’s really nothing wrong with it.
Causes cancer? that is a new one on me
Causes Psychosis? I agree- if you smoke it to excess. In moderation (like alcohol) I have never seen it. However I have seen much worse effects from excess alcohol
Funds organized crime? Also true- because it is illegal. If it was legal anyone could grow it in their backyard - it is remarkably easy and cheap. The only reason it is so expensive is that it is illegal.