In my opinion making cash from gambling is not a good option and the statistical probability that you will win every game at every casino is very low. I think winning or losing every game is completely in your head, so your individual tricks are not there. However, we all have some kind of luck so we should strive for what is possible for us.
Obviously, considering gambling a form of income or a sort of money-making scheme shouldn't be a usual practice as it's not possible for everyone.
Yes, there are few gamblers who are able to keep their gambling career as their main source of income but they were able to reach that status because they build it alongside their unique skills. Aside from that, I found it too risky if we rely on our financial needs for something that requires luck + skills just to have a good and decent winning in return.
Is gambling all about luck? Simply, yes but there are gambling types
e.g. sports betting, strategy-based games, etc. that do not rely and depend too much on luck but rather gamblers on these fields are working on something to somehow increase their winning chance rate.