I think people should have the legal right to hurt themselves without fearing that they're going to get locked up for doing so. But on a personal level, if someone I loved was hurting himself or herself in front of me, I would, of course, try to restrain them.

That's the thing. in medicine, you're used to saying there's a problem within the person, and saying there's a problem within the culture, that's not a medical answer. Medicine has to look in one direction, so there's only one type of answer that they can find.