It's all about what they used to do and believe and so the others too, that's how they're going to live and deal with the others as well.
Whether you don't wish them misfortune or whatnot, there's really nothing you can do with such decisions being applied by them for these beliefs that they've got like feng shui.
I echo your sentiment, it is there personal believe and they are the one who will benefits or loss if they continue to believe on such
kind of supernatural, if they lose they will move forward same deal with people who don't believe in it, they will try to win and if they lose
they will just re-try their gambling and see if luck will permits them to win. People who believes in some additional luck kind of rituals
are also people who just wanted to win.