I think that gamblers who believe that the spiritual side of life influences gambling and winning results appear after they start trying to predict their winnings. And when one of them actually wins, he connects these two events and begins to think that it really works. That the spiritual side of life is an influential part of gambling. And that this way you can also control the outcome of the game.
This is just ignorance that will cause one to lose more. The worse thing that can happen to anyone in gambling is not having understanding of gambling and this will make one to have a different understanding that will definitely mislead one I'm spending much money because more money wants to be won. Gambling is just lucky and their is no attachment of any super natural power in gambling. Just purely luck and nothing more.
Gambling is pure luck that's why some people believe that there's something that can be done spiritually or supernaturally to attract luck lol...in my country some people go as far as looking for items that can make them win always but the people selling these things to them are lying to their face but they are too desperate to notice This.. like you said it's all about getting lucky nothing more or less than that