To be fair, rich people are just throwing money to a thing that's only entertainment to them and it doesn't interest them to spend a lot of hours in a casino. Their priority is their real game, the way of making more money than spending time on a gambling that doesn't really assure a huge profit. Rich people already have a game that gives risk but also assure a good money, so this gambling thing isn't a way for them to find money. Most of the time, they gamble just for the thrill or to socialize, not out of financial need. When they lose, it’s just part of their entertainment allocation, they're not affected to it.
That's actually true, some of them that are gambling are using it to pass time and socialize with friends, they already have some serious investment that they took risk to invest a significant amount of money with high chance of getting a good return but they are financially smart to know that gambling is not what they should consider as an option to put in a huge amount that they can not afford to lose, because they know that it doesn't take time to lose it all or double it, which can be way riskier than expected.