its not just luck though. when a game has high variance it means people may be playing looser than normal, which in turn means more bad beats and what not. omaha has a higher level of variance than texas holdem because more people see more
hands, and more hands of higher value can be made by multiple people
variance in the presence of variables that influence results, the more variables, the higher the variance, what those variables are and can you see them is the question, and should dictate how you go about playing a particular game