Makes sense. If something is harmful to people, government should 1. Ban advertizing of it. (because it provides no benefit for the nation as a whole) 2.

Makes sense. If something is harmful to people, government should 1. Ban advertizing of it. (because it provides no benefit for the nation as a whole) 2. But allow people to do it. (because they will then do it illegally, which is bad for the nation as a whole) I think it's that simple.