There's actually no joy in losing money and no gambler derive happiness from losing their hard earned money to casinos or wherever they're playing.
When you buy something new or desired, you feel joy, but similarly you are spending hard earned money. Then the logic would be: there is no joy in spending money. But that is not true. People always enjoy spending, otherwise it will be no use working hard and trying to earn more. I think it will take time for people to understand, that when they gamble, they spend but not lose money.