If I understand what you say, a rich person's personality changes a lot and their visions of what they want change too, and casinos and games of chance are something they can easily lose money in , and they don't like that fact, so they Prefer not to take it as seriously as others, because they don't have the need to make money , they just want to make their money grow and not lose it, that's their mentality.
If a person is rich, it means they have found a way to make money differently, I suspect it is some successful business or profitable investments. In other words, if a person is smart enough to earn a lot of money in a different, less risky way, then of course they will focus their efforts and attention on what brings them that money. Gambling might not even be interesting for a rich person.
Maybe they will try playing just out of curiosity, but if it does not work out, they will quickly give it up. Rich people think in terms of money and are very good at assessing risks. That is why such a risky and complicated way as gambling is something they will most likely just exclude from their lives.
I agree with you. Rich people do not think about anything else except making money, in fact their attitude is made in such a way. They conduct all their activities with the addiction of making money. Almost in the same way they have taken control of their destiny through hard work, patience and action. If you ask them to play on the gambling board for entertainment, they may spend some time and after losing, they will lose interest in gambling. Some of them may avoid the issue of losing money and gamble for entertainment. The way you evaluate rich people their main goal is to make money and become richer. You may call poor gamblers greedy because their wealth is limited and they lose their money in the initial stage and later they cannot gamble without alternative income.