It seems to me that the essence of addiction is not in the desire to win or to win back, but in the desire of the very process of the game, so your advice is unlikely to help anyone. As we know, even very rich people who do not need big winnings suffer from gambling addiction, they depend on the very process of the game.
There's a reason why they gamble, they still want to win big as that's the ultimate purpose of gambling. No one in this world had an infinite amount of money even if we call them to reach, they still get excited and want to win, so in the process, they get addicted as they also have an ego especially if they are losing. Them not being able to control their emotion, that will lead them to bigger problems and that could result in bankruptcy.
But if a player can afford to lose, for example, $ 10 million, then it is obvious that during the game he will win one million at least once, right? I think this is quite easy to achieve and it is a large sum. But I am 100% sure that after such a win, this player continues to play and this is explained by the dependence on the game process.