in the long run luck evens out between everyone.
if you play enough
hands, you'll see that you get AA the same amount of times as other people do, you'll hit 2 outers the same amount of time.
over a short run, luck isnt even but in the long run its completly fair, which leaves room for poker skill to win the money.
if you have more skill than your opponents, you'll win more, simple as that.