In the short term and at the beginning, gambling can really provide big profits, that's why newbies will continue to play because they feel they can earn a lot by gambling, but in the long term gambling will bring gamblers to big losses so experience doesn't help at all. In gambling, luck plays a big role and experience only plays a very small role because experience gives the gambler the knowledge of when to stop or continue playing, not how to win the game, so without luck, experience has no influence whatsoever.
You could say that experience in gambling is experience in losing
And in fact, it is. If you put aside various tricks and abuses (like bonus hunting, searching for vulnerabilities in algorithms, etc.), then gambling is a waste of money (I have nothing against spending money on entertainment, but some people try to make money in gambling). So having experience in limiting your losses and self-control is a useful experience here.