I was quite surprised when I read this article for the first time because they gamble not for money or pleasure but because of the culture to test luck.
it is true that gambling is like betting on luck how much luck we have on that day.
but in gambling for me luck has a very small chance to get it. so there are still many people out there who consider gambling just for entertainment or to fill their spare time. but that's all actually to cover up being disappointed when you always lose at gambling and actually hoping to win to get more money.
no one wants to lose constantly spending money and losing at gambling, unless the person is very rich.
If it's part of the tradition then why not? Indeed, in different cultures there are different types of "offerings to the gods" which in modern conditions have turned into something like charity. When you donate to charity or spend on traditional entertainment (like New Year's Eve), you don't expect to make a profit, do you? If the symbolic spending on the "test of luck" is perceived as such and this is an element of culture, then there is nothing special about it.