Playing for fun is just a cover-up of our pains, we don't 100% play for fun.
There are some gamblers who try to keep their gambling spirit even after losing. They try to console themselves by thinking of gambling as fun at that time. Although a small number of people may accept gambling as fun, in most cases gambling is considered as an easy way to earn money. When a gambler loses, he gambles again in an attempt to win money in the next bet. That is why I think gamblers can continue their gambling by considering the possibility of winning money again as a stimulus. In this way, even if a gambler loses in gambling, he can enjoy gambling.