(or generally: “Is the cocaine cartel comparison fair or unfair?”)
And in my experience potheads offer you a toke and if you politely refuse, no problem at all. Coke addicts don't want to take no for an answer and insist that everybody should do it, they get so much more done, decisions are faster and better and what the hell is wrong with you if you don't want some?
So, the users are similar too.