Not too long ago there was a clear division in psychiatry over two distinct forms of mental illness: organic and induced.
A good way to compare the two is with psychopathy and sociopathy.
Psychopathy is a “spectrum state of mind” in which a person does not empathize with others. A little bit of it is essential for people to function, more than that is useful in providing objectivity to emotional situations, more than average makes for good leadership. Beyond that it starts to become pathological and dehumanizing to others. In the extreme, other people are nothing more than objects to be used or abused with indifference. Only a small number of “psychopaths” are unable to adjust their behavior so as not to criminally offend.
And all of psychopathy is a natural state of mind, how your brain is wired.
Sociopathy achieves a similar result, but it is trained behavior. If addressed before adulthood, sociopaths can be retrained so as not to be abusive. After adulthood, it is usually set for life.
In any event, if a person suffers from any number of organic problems, including brain damage and trauma, they need medical care before psychiatric therapy. And granted there can be some overlap between organic and induced mental problems, such as PTSD subsequent to a concussion.
I just jump on one of my motorcycles to deal with depression. If I come home in one piece it makes my day.