The nasty little secret is that the coaches telling them that just want to have a few good seasons so they can use their present position as a springboard to a higher paying job. Coaches like Roy Williams at Kansas show us the way it should be. Williams gets upset when his team plays badly and loses, but he doesn't have uncontrolled temper tantrums and go into convulsions. Self-control is something most people learn sometime before the age of 60, or they usually end up in prison. In the world today, with the way young people analyze authority figures, he can't.
Most coaches teach discipline, along with how to grow as a human being and be more responsible.
We should demand those things be taught, and people who hire them should also. Knight's problems may be more along the lines of a god complex. They can lose any sense of humility. Maybe Knight learned that when he took the fall from his throne in Indiana. Maybe it reminded him he is not God.