Why isn’t willpower enough to quit smoking?
When you choose to quit [by] using willpower, you likely haven’t changed your core beliefs about smoking. When you take away the desire to smoke, then it doesn’t require any willpower to avoid smoking. Think about it. It doesn’t require any willpower to keep from sticking your face in a blender, right? Of course not, because you know that there is nothing anyone could say to convince you that sticking your face in a blender is a good idea. You can reach a similar point about smoking, where any arguments in favor of smoking are no longer persuasive at all. At that point, there is no more need for willpower because smoking isn’t something you want to do.