I remember one of the clients I had on internship. He’d been drinking a fifth of bourbon a day for years. As you’d guess, his liver was a mess, and his thinking was clearly impaired. I couldn’t help but wonder how much better his health would have been (and how much money he could have saved) if he’d used cannabis instead. Of course, if I’d suggested that he switch to a safer drug, my supervisor would have berated me so loudly that everyone in the clinic would have had to cover his ears. There was…