The OP asked ""Who here smokes weed? Is it THAT addictive?""
I Responded by saying ""It depends on who you ask. Pro We = No. Anti-Drug = Yes.""
It could have ended right there.
You choses to try an minimized the physical addictiveness by saying "nicotine or caffenine. not by the classical definition."
I responded with real like examples. You can't try to separate the physical and psychological aspects of additive nature for your own benefit.
I'm not separating the the aspects of physical and psychological. So, I don't know what you are trying to get at. The OP just asked a basic YES or NO question.
. . . "Today is your day to have a better life -- it's your right."