It's not good to work extra hours to manage money for gambling, but if it was for supporting the family or managing finances, then it would definitely be good. Is it any kind of income to earn money by working extra hard and then gamble with that money and then lose money after betting? There may be other ways to have fun, but it is not something that has to be done with money earned after a lot of hard work. If he had worked hard, of course he would have saved his hard-earned money, but instead of doing that, taking a gamble is an uncertain and unguaranteed possibility that is not worth supporting under any circumstances.
Yes, this is also my thoughts when I read the title, why would you work so hard and then just let that hard money be into gambling? It doesn't make sense at all, working double shift at night and then when the paycheck arrives you will just gamble it right away?
In any case, if someone is really addicted to gambling then maybe his decision is clouded to do such things and be "inspired" to work so hard so that he will have a lot of money to gamble and hope that he can win big. But for me, I wouldn't go that route, I will just play to have some fun or gamble the money that I can afford to lose.