There's something to keep in mind. You are your brain and your brain is you. You're not some sort of cloud of abstract disconnected thoughts. The "loop" you spe

There's something to keep in mind. You are your brain and your brain is you. You're not some sort of cloud of abstract disconnected thoughts. The "loop" you speak of causes real physical changes to a real physical thing (so do traumatic brain injuries which can cause depression, btw). It doesn't really matter how the changes start or take place, once they are far enough under way it becomes impossible to quickly undo them. It can be and is cured with drugs, and rehabilitation therapy and it takes time. The cure is also a physical change. Sounds pretty disease-like to me.