Everyone needs luck to win in gambling. When you make a prediction and when that prediction works and you win, it means your luck has worked. You had that win in your luck, that's why you won. No one can say whose luck will work when. Luck is an invisible thing. If you have a win in your luck, then you will make a prediction and decide which one you will win. But if your luck does not work, then you will always make the wrong decision. Luck always works invisibly like this. But you cannot blame luck only all the time because if you do not have knowledge about the game you are playing, then you will never be able to make a possible prediction, so to make your luck work, you must also have knowledge about this things
Though, I have the impression you are talking about luck as if it was some invisible force which controls our destiny and the outcome of our money each time we decide to bet on a match or roll a dice, I don't see it that way whatsoever.
See, instead of talking about luck and how it alledgedly controls our destiny on the casinos, we should talk about entropy, chaos and disorder. When entropy, chaos and disorder happens to coincide with our prediction, then we call it good luck, but luck it is not the phenomenon itself, but rather the name of the outcome (which we desired from the very beginning).
You should read a bit about the chaos theory, entropy in thermodynamics and gauss bell of distribution. You will realize how far a single person is from controlling their own luck and how we should stop using such a term when comes to gambling and replace it with "entropy".