It's been a while since I've written about the burgeoning business of selling marijuana as a cure for whatever ails you. As I've written before, there exists a mystical faith that is very much like herbalism that marijuana is a magical plant that can cure, well, almost anything, including cancer, glaucoma, autism, ADHD, and many other conditions, when in fact the evidence is rather shaky for most, if not all, of these claims. Regarding cancer, the usual claim is not that smoking marijuana cures the disease, but rather that cannabis oil isolated from marijuana cures cancer, a claim that Rick…