There are no new stories. There is also the principle that actors when they play criminals, always try to get arrested. The strongest man in the world. To have a worthy antagonist. To know where you are in your journey of telling a story.
Clinical insanity is how far a person is from sanity.
Use the principle you learned to work with. Those are the tools. Most people learn them but don't apply them. Villain don't play a villain. What people want is based on their pride, when choosing an objective.