I think you are right to a certain things but I wouldn't say that only the rich people have the ability to keep gambling, I know some dirt poor people in my place and they are in the gambling house all day 24/7. I wouldn't say it is not a bad thing because that money could've gone to a better cause like free housing for homeless or soup kitchens, there are a lot of problems that these rich people could solve but they choose the vices.
I wanted to say that the idea was basically rich people can keep gambling longer than poor people and that was the point. Sure poor people can gamble so much that they could lose their cars, houses even get to a point where they will lose jobs, loved ones and more. However even if a poor person goes as much as to a point they are homeless without a single person in their life and a single dollar to their name, they still can't reach to rich peoples levels, and that's just a fact.
I can sell every single thing I ever own right now, and it still wouldn't be nowhere near the levels of these people, literally every single thing I own would not be worth the amount these people are putting up. This is why I understand that poor people could gamble more and more if they are not careful and that's a bad thing, but even in that situation they are not gambling like rich people.