No matter what the strategy is, if you don't have luck, you will not have a chance to win the games.
Luck matters but we should not think that it's only the sole factor that is needed in order to win in gambling.
We keep learning to improve our strategy so we will eventually become consistent with what we are doing and that it would be able to bring us some wins.
Gambling is a game of luck if what we are referring are luck based games,.. hopefully a gambler would see the difference.
Yes, we can always modify or improve our strategy so we can have more chances to win the games. But that doesn't mean you will have a big chance if you success modifying your strategy because there will be a lucky moment in your strategy. Maybe we can modify our strategy for 1000 times, but in the next 1000, you will not know how your chance is to win. We can only hope that every gambler will see that luck factor will be needed in gambling, so they know that they need to break for a while if they lose much money.