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.
You earn money to spend, money is not something to hold on to, if you earn money and cannot enjoy anything with it, then your earning money is worthless. However, in gambling there will be losses and wins, but here you can never expect only wins, because without losses it is never possible to win, so here you only have to look for entertainment, you will use the amount of money you can afford to loss for entertainment, and keep yourself in control, gambling is only for entertainment, where you can often benefit because of your luck.