In poker, you might make a good decision, one that has a chance of winning 2 out of 3 times over the long run but if the 1 in 3 times that you don’t win comes first, then you had better make sure that you don’t bet all your chips on that hand. If that one hand knocks you out, then it doesn’t matter that math was on your side. You’re out of the game.
The best way to win over the long run is to make your run as long as possible, to give yourself the longest amount of time to win, in poker, business, or anything where you’re betting on uncertain outcomes. The longer you stay in the game, the more chances you have to win.