When you hire someone to fill a position you usually go with the one whom you think will do the job best. Hasn't don done that?

His idea of "best" may not be yours. His requirements of his subordinates may not be the same ones as yours would be. Best is hard to describe. One size does not fit all. Only the person who does the hiring can decide that. All in all hasn't don done a great job? He hires a lot and fires a lot always seeking that perfect blend. One day he will reach it.