Maybe if you are playing a math based game then probably it can help you. Yet most of the gambling games are basically based on your luck or other skills like logical thinking. I think the author was trying to atleast relate it to math and did said that you will win using mathetical equation
Can you give an example of a math based game gambling? I have never seen such game so far, as what I have seen so far are just game with numbers such as dice, roulette and lottery but I think they are not math based games.
Maybe they were saying that it's math who helps them to win in gambling because they are lucky on betting though thinking they win because of math is not true at all, it is all about being lucky despite of the risk that you are at since you are playing gambling. Math couldn't help you in gambling, it is all about random stuffs so applying math will not help at all.