Ah yes. Fielding percentage means nothing. Batting average and slugging percentage means nothing. J.D. Drew is a better hitter than Albert Pujois. Well so what if Pujois has stats on his side. They mean nothing!
Honestly, baseball is a statistician's dream sport for a reason. Just because unpredictable stuff can happen from time to time doesn't break the rule. It just shows there are exceptions. Golden State beating Dallas last year doesn't mean that seeds are worthless, does it? Does it mean that W-L record is worthless too, since Dallas won 67?
Or, more to the point, if you need to win a game, would you go with a pitcher who's got an ERA over 8.00, or one that has an ERA in the low 3.00s? Because if you honestly answer that question as you should (the latter), you cannot say that stats mean nothing. Even IF the pitcher with an ERA of 8+ has more wins, that hardly suggests he's a better pitcher, does it?