In my definition of luck in gambling I usually say that luck is brings us close to winning by being at the right place of betting a particular game at a particular time since if such games repeat itself the results can be different entirely, we maximize every bit of whatever we think can be a possible outcome and hope that luck sees us through but yeah most times we are caught ( Lossing) and most times we win too, there are those who has been gambling for long without having the experience winning, it is because luck has not been on their side by not being at the right place at the right time.
Luck is a chance that does not depend on you, so I do not like to play such games where I do not need to decide anything. I am not even completely sure that luck in such games decides anything, it just turns into a matter of chance, nothing more. But if I do, then I also need luck, I need my team to score goals, or take corners, to some extent my bet will play or not, this will be affected by how lucky my team is having a day, or other episodes in the game will also depend on luck.