I agree, it's actually something I considered adding to the post and then didn't. While there are certainly people who push for it because of the medical possibilities, the majority likely just wants to smoke.
This could even have other consequences: interactions with other medication is likely. And if everyone is smoking, the actual pharmaceuticals might be much less effective for those people.
I don't really care what drugs people take, as long as others don't feel the consequences (I hate smoking with a burning passion), but yes, the support for medical cannabis is likely not happening because of the healing potential.