I see no real reason why it shouldn't. It's healthier for you than nearly any prescription drug you'd find today. Plus, it's a naturally grown substance (when it's not mixed with other nasty junk), and if we were to legalize it and tax it as we do with tobacco, it'd generate a lot of money. I have the statistics somewhere, but it's 3 in the morning and frankly, I'm about to pass out from exhaustion.
Also, what crimes to marijuana smokers commit as compared to crack/cocaine users or meth users? They don't go around murdering people, or stealing things, or anything of the sort. They sit around and enjoy life. While they may come off as lazy and unproductive, they're better than their other illegal drug using counterparts. I'd rather be a pot head and vegetate on a couch than smoke meth and be crazy as hell for days on end.