A player is a paid professional. He's paid NOT to make mistakes also. Guess what? They make mistakes every game...each player does. Look, the pitcher threw a pitch right down the middle and I took it, strike one. Mistake. Look now, that breaking ball was in the dirt and I swung at air. Mistake.
You could make the same argument about the coaches and manager. They make the wrong call sometimes too and effect the outcome of the game.
Right. And if a player on my team made a whole bunch of mistakes, I would say he should be replaced. Same with a manager or coach. And thus, when an umpire screws up, I think he should be replaced too.