The problem is that for many people, gambling is one of the only opportunities to escape poverty. Yes, only a few people succeed, and not everywhere has a real chance of success, but it's opportunities like this that inspire people. And the rich always have a chance to become poor because of uncontrolled spending.
That's true because they see some people can make money from gambling and want to get it too so they think they can make money like those people. There are indeed people who can make money from gambling, but there are not as many people as there are people who lose from gambling. They know that they have to be careful when playing gambling and must be really strict in using their money to gamble. We cannot compare ourselves with rich people in gambling because the amount of money is very different and they can gamble using more money than us. We can only gamble in moderation because if we don't, we will lose a lot of money, which we will regret.