what is involved in gambling is neither you win or you lose, this has been the method of gambling, and you can't because of your wining in the gambling and you lose everything, it will be better to have plans in your gambling, because the plan you have maybe better for you, theirs people who has been gambling for years and they have not recorded any wining but they continue ti gamble because they know that gambling is all about luck, not by your accuracy.
I have a mixed reaction where you said that some gamblers after years of no wins still push harder. There are two kinds of players in this category which is unclear which one you're referring to, and both sides also know gaming is all about luck; the responsible and compulsive gamers. However, having a detailed strategy and practicing it, helps players to be time and money conscious, and facilitates responsible gambling.
Luck is a concept only for the player, because for the casino there is no such concept. For the casino there is only an understanding of the algorithms in which the user will win or lose. The same in other games, there is no luck - everything depends only on events. Luck is an incredibly small factor, but it's essentially a margin of error for whoever allows you to play. Obviously the one that lets you play won't let you ruin yourself, so has different algorithms. And as for those who play for years and lose, he just becomes addicted to constantly looking for money for these games, it always ends badly