Actually you have a point, but on the other aspect, I can say that one among 10 strategies might work. Although winning is by luck and it's like luck and time works together. When you are using a particular strategy on sport bet always, one (1) day you can win with that same strategy because not everyday the teams you played will continue to play the opposite. (eg) Like betting on Manchester United to win Manchester City and it has been cutting (ending the other way round) one day Manchester United you played to win will win. So am only trying to say, strategy, luck and time have to work together for a gambler to win.
That could be the case if you’re having to gamble on single bets, always playing one particular market every time. You sure would get lucky at some point, you would lost a few or much but, your luck would come.
Should you happen to be playing the accumulated bet option, your chances are reduced because, you’ve got a wide range of prediction as it givers several games and it’s always unlikely that a single market would play out on several games. You could win still but, options here is often variable.