"We're not talking about balls and strikes anymore!'

[Rufus]

As a coach I've tried to beat into my player's head that there are a million things (give or take 500K or so) that are going on during a game, of which they can control maybe 5. Rather than get hacked off at something an umpire is/isn't supposedly doing why don't they just concentrate on what they are doing (like recognizing where strikes are being called and adjusting if necessary)?