You're being delusional if you don't think that most (notice I didn't say all, but most) of these guys are just hiding behind patients in order to promote their recreational weekend habits. If you gathered 20 pot smokers in a room and asked them if they support legalizing reefer, I guarantee you at least 14 out of 20 would have glaucoma/cancer/HIV as a defense for legalizing, not recreational use. We all know deep down that the majority of pot smokers that are out in front on this issue are really being disengenious.
Again, this is coming from somebody that believes in legalizing pot. But they don't have to insult the intelligence of the public by demagoging the issue.