Does luck really apply to it?
I mean each team has its share of chances or possibilities of winning the game. You bet on one team because maybe of your analysis that shows that they will or could win the match. Since they have their own shares of chances of winning, you never know what to bet so people usually bet on low odds. Sometimes the higher odds win but it is not because of luck but it is quite surprising given that they are the underdog or has the lower percentage of winning the game.