You only hit a set roughly one in seven times. It's pretty bad to find yourself up against an over pair to yours. It's a really frustrating when you lose up some of your luck hitting your set only for your opponent to hit a set too. You may as well not hit you set and save the luck for another time.
Nick Binger got it all in preflop with pocket threes and was isolated by his neighbor with pocket kings. A sweet looking three appeared on the flop but so did a nasty looking king. One Binger down.