It is only rich people can use gambling as entertainment because for them the result of losing is only entertainment. But many people gamble with the dream of becoming rich, but when they lose, they lose their money. Gambling is difficult to lose, so there is no entertainment. I was sitting in a shop eating and next to me a man was placing bets repeatedly in gambling. I see his wallet he has lost a lot of money yet he is betting but this was not enough entertainment for me. Because I know that it is difficult to earn that money if you lose by gambling.
There are people who think of making money by gambling and these people lose all their money by gambling and end up destitute. Because they continue to gamble to recover the money they lost by gambling, they lose all their money and they don't care at all. Losing all the money gets very worried. So the big people never get extra greedy because they take gambling as a pastime.
Of course not all rich people gamble because they have mountains of money so they don't see gambling money as important. Especially the middle class will continue to gamble even after repeated losses. Their only goal is to get rich in a very short time. But we can get some stories of people who got rich by gambling. Gambling is not really for fun, and there are very few people who consider gambling as fun.