MLB Umps: Does your incompetence know no bounds?

The officiating in all pro sports has come under criticism lately, but while NBA refs such as Nova's own Tim Donaghy can at least claim that they are fixing games, MLB umps are simply incompetent. Friday night's Phillies/Red Sox game was a new low for the league. In the bottom of the 11th in a tie game, Phillies' pinch hitter Gregg Dobbs hit a drive over the right field foul pole, seemingly a walk-off homer. However, umpire Jim Joyce had different ideas, and called the ball foul. (The fact that this loser has the same name as a a great Irish author is a travesty in and of itself). The league has recently instituted a rule that instant replay can be used in plays such as this, so one would think that a potential game changing play such as this would be the perfect oppurtunity to use instant replay. But Joyce would have none of it, claiming he was sure it was foul so he didn;t need the replay. How is it humanly possible to be that arrogant? Are the ups really that afraid of being proved wrong that they won't allow replays to be checked? Joyce obviously got cut from his high school baseball team and now wants to take it out on major leage players, that's the pnly plausible explanation.