There is something called self-control. What I notice is that every time individuals can't control themselves from doing something, they blame it on some form of disease. When they shoot up an entire school, it is mental illness - When they steal something, it is mental illness - when an individual cannot exercise self-control when playing video games, it is a disorder. There are probably a few instances where it is a general illness but in most cases, you find it is a lack of self-discipline.