It all depends on the person. A very small percentage of the population used to be so religious. Not many get into gambling, even if they do, they will be like, We need to start to wager after a prayer. They are like completely controlled gamblers, because if they don't win, they just quit because God isn't willing. I'm not sure of it, but religious books say we shouldn't show interest in gambling directly, but indirectly. Whether one needs to follow or not is up to the person's belief in the religion.
You just described to everyone the most retarded and hypocritical kind of religious person is, it's against that religion to gamble right? Then how come these scums are still gambling and thinking that it's all God's will whether they win or lose, it's a really weird thing and it contradictory to what these people really are, either you're explaining/articulating it wrong or these people really does exist because it's such a sad thing that they're using their religion as an excuse to gamble but the reality is that they're just gamblers that doesn't really care about their religion and doesn't have any respect for it.