Rich people have a good source of income to fund their gambling. Most of them just use gambling as stress reliever so even losing some is already fine with them because they can easily earn it back while they have some fun on their free time.
They use gambling the way it was intended which is source of fun since most of rich people doesn’t have a legit social life due to their business or work habits.
Aside their value their money, they have huge funds for them not to cling on gambling to win more.
Your post can be understood differently. A good source of income might allow rich people to gamble more often or place larger bets. Wouldn that frequent gambling has more chances to turn into hobby first, then into addiction? Dont forget that nobody wants to lose or be losers. Rich people are not exception. Those who say, that rich can allow themselves to lose and have thought to win back, are wrong. Nobody loves to lose money.