[ModernMech]

I don't think so. I think it's a recognition of the habit forming qualities of the drug, the reality that some tasks require 100% effort, and sometimes weed gets in the way of that.

Listen, I love weed. I'm going to buy some tomorrow for the weekend. But there's no denying it's habit-forming and a large number of people fall into a pattern where they devote their day to smoking weed from dawn till dusk. There are a large number of people here talking about how productive it can make them and I get that. I wrote my dissertation high. But there's a whole spectrum of behavior associated with habitual use and it can lead people to get in a rut where all they do is smoke. Visit /r/leaves sometime and read the stories there.