The most major issue with cannabis now is the unknown streams you get.
10 years ago, the supply was more limited. Weed was weed, skunk was much harsher. These days I don't think you can actually get "weed" as so much of it is chemically enhanced when its grown. Sometimes you got weak stuff, other times it would knock you out. My partner would get really effected by some gear, and it wouldn't effect me, and vica versa. Same goes for friends. "try this, its really strong" so you'd have some and question what he/she is on about
This is where Amsterdam has it right (only be it in some coffeeshops) where the lists are detailed and explains what kind of high the particular type of cannabis your purhasing (excitable, relaxed, heavy etc). Control the types, make different types on offer and no-one needs to go any further.
All this talk, I want a smoke now
But thats mental, I don't actually want one, so I wont. You know what its called??? Willpower. Some have it, some don't. I went cold turkey. Its not actually hard to do at all if you want to quit.