[DrThunder]

"Like you cant "occasionaly" smoke cigarettes, either you are addicted or not."

I don't think there's any factual evidence for this at all. I occasionally smoke cigars (like 1-2 times a year) and I'm not addicted to them. Multiple friends/family members do the same.

"Yes, but often the root issue of addiction is mental health issues (and not only the drug itself)."

Agree, but not everyone who has mental illness issues resorts to drugs for help so there are many other factors to consider.