It's not out of the realm of possiblity that another player has the other 2 aces. So if your up against AA and KK you have a 4 to 1 shot of losing and your best case scenerio is a four flush that hits your suit, with the most likely scenerio you split. If that's the case you have much more to lose than gain so why play? You can't win this tourney on the first hand but you sure as hell can lose it.If its AA vs KK vs QQ or still less than 3 to 1.Obviously the best case scenerio is AA vs AK vs KK but I don't think folding is wrong.