Luck only matters in the short term in poker, just like in blackjack. By giving yourself better percentages to win, you accumulate money over the long haul. Did you know that if you play blackjack perfectly, the casino only has something like a 1% advantage over you? Still, that percentage adds up over time, and even considering that most people play badly (maybe bringing the edge up higher), it's enough to pay for the dealers, the space, etc, in the long haul.

Most people forget their biggest wins and remember their biggest losses. I can't remember almost any $300 and $400 wins on a hand, but you'd better believe I remember a hand where someone hit a gutshot straight on me with 7 outs in the deck for a $400 pot with crystal clarity.