i think rich people can handle the losses better since it won't affect their basic needs. but poor people might lose their family stability, mental health, ... after a loss! in general, gambling can be addictive regardless of someone's financial status and should be viewed as a form of fun.
The rich gamblers can handle their loses we accept that but in as much as gamble is included, there are some certain extent when a gambler (either rich or poor) will lose money and he will feel bad about it, and those things can either be the cause of when they chase their losses or gamble with the influence of alcohol and so on. Such things can make a gambler to become addicted even if you are a newly Gambler or an old time gambler.
While rich gamblers can handle losing, that doesn't mean they won't lose a lot of money. After gambling for a while, they can lose control of themselves and that will make them gamble again. If they have lost self-control, they will follow their lust to win the gambling game or recover their losses.
At that time, they will also lose their minds and will chase their losses in gambling. They will not remember the limits they set just to catch up with their losses. In the end, they will lose and lose more and more money.
That is why, whether rich or poor gamblers should not gamble for too long and just enough to avoid losing a lot. When they start losing and don't stop themselves from gambling, at that time they will be triggered to continue gambling. They will lose money that they could not have imagined before. The only regret they will feel is that it has all happened.