If they bang on your dressing room door, all hell will break loose

The thing with great managers is that they do what suits them best. If a manager is selfish and does the things that ensures he keeps his job then that gives his team the best chance to be successful.
Alex Ferguson was a master, completely blinkered to sporting hypocrisy in his quest for success and always shameless with it. There was never enough time added on at the end of matches for Fergie, unless of course there was too much.