As the title itself, Im thinking about the valid reason why gamblers continue to gamble even if they are losing a lot of money. Is it hard to understand that gambling will just make your money lose if you still continue?
So many addiction stories, people shares their losing experience and yet you are still gambling. The more you play the bigger the chance to lose the money. What is your reason to continue? Are you willing to chase your loses despite of the risk?

Source:
FaisamtraderChase to fall? 🧐 - (Not a photo of mine, just for an illustration of being greed)
As for the title of your post, yes, there is a valid reason to continue gambling not for being addicted to it but for leisure. Of course everyone of us needs something to release our stress from the daily grind of our lives, so having spare time to gamble is a good idea. Just remember that doing gambling is not for earning but for leisure and to kill your boredoms.