Life is more complicated than a simple of binary of having responsibility and not having responsibility for a certain affliction such as smoking addiction. Often it's a varying mixture of both.

We should be working to pragmatically solve problems, not playing unhelpful blame game. Doctors don't go around trying to make sure that their patients are first virtuous in their self care. They get on with the business of medicine and do their best.

We now have a powerful drug that help with obesity. Let's make use of that when nothing else accomplish the job as we work on other alternatives such as better regulations, psychological health, etc.