"Well, don't make things that serve no other purpose, but - say there are five hundred people who need morphine varying amounts in a given year, which is a number I just made up. Assuming everyone is either apprised of the risk ahead of time, or in so much pain that someone else has to decide for them, the choice is pretty straightforwardly between giving a hundred people an in-most-cases-temporary problem that sounds much less unpleasant than receiving surgery while merely blind drunk - itself not a risk-free painkiller - or torturing five hundred people who would have preferred the risk. I... think this is fairly straightforwardly in favor of making morphine as available as you would with any other drug, and just peppering it with warnings and maybe not giving out too much at a time to anyone who isn't themselves dispensing it."