Maybe people not remember that the luck factor will be behind on that winning and that is what they must have when they play gambling.
If they believe in superstition, that will not work for them as luck is needed to win.
But they can play without any intention to win and maybe they can win by coincidence.
Each person plays according to their own rules, this reminds me that years ago when I played in traditional casinos, a friend expected to spend all his salary in the casino, when we went he could not see anyone dressed totally in black, because he said that that is a " lump of salt "and he lost in the game, the most curious thing is that it always happened to him, at that moment he paid attention to those superstitions, which he combined with his emotions and when he played he lost faster.
I know that people combine these beliefs with their way of playing and if it influences, in fact each person tends not to accept that they lose, for me it is a combination of high self-esteem + psychology, and if they do not face it in a good way, it is likely that they fail in the game, which will cause them to lose money.