There are many more attendees of M.A. meetings than there are of people in recovery, trying to quit reading because it's had life-altering effects on their minds.
"Addiction isn't a problem" is the biggest myth perpetuated in the smoking community. I'm not trying to make pot out to be any more or less monstrous than it is, but to claim that addiction isn't something that happens is to hide one's head in the sand.