Broken relationships, failing health and poor judgements are just a few of the inevitable results of letting the job consume you. Burned out subordinates are also a result of a leader whose priorities are misplaced. It's deadly when a leader gets seduced by the perks. Once a leader is enticed by the pursuit of perks and power, it's difficult to arrest the invasion. Too often the egotist can't handle being wrong or embarrassed and is unwilling to admit mistakes or to being human.
Some leaders have charm and personality but lack an inner core.
They remind me of the story of the oak tree. A huge branch was lying on the ground. With the oak tree's reputation for strength, the giant branch should have been capable of withstanding any storm. But although it looked strong and vital, it was hollow inside. I once worked for an officer who was charming and on a fast track.