If gambling is for the rich, what will be their aim for gambling? To lose part of their wealth or what since they are already rich? Well, you will say they gamble to catch fun, but what fun will they catch from gambling that PS 5 and other video games cannot give them?
Majority of the people that gamble do it to earn passive income. Therefore money is the common denominator which means those with a decent source of income can gamble with their dispensable income. You don't have to be rich, as long as you can meet your basic needs and still have discretionary income, you can gamble and aim to earn more money from that.
Gambling is not only for the rich, for some rich people gambling for fun not actually to make money, some rich people have different notion about and so is average and poor people, many rich people understand how gambling works, for that reasons they don't allow it get into them and even though they gamble, they gamble to get the fun in gambling nothing more while some of them gamble to win, there are rich individuals that gamble heavily for the money, don't forget as humans, there's no satisfaction to how rich the can get, so regardless of the amount of wealth or money some people has acquired, they still want to get more and more even when they no that the means in which they want to want the money from may not be possible, the will have to convince themselves with the saying that there's no harm in trying.