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.