Gambling for fun, do you think it's wrong for you?
It's not wise to gamble your earnings from gambling, but there's nothing wrong if you just gamble for small amount money or amount you can afford to lose. Are you never use your money for fun? spending for entertainment. It's like you go to night club with your friends, you donate to Vtuber, gacha game to get your favorite skin etc.
I think the character of a person in seeking entertainment to use his money is different. For a non-gambler, he will use their money in nightclubs or tours. For some people gambling is not entertainment, it is a place to earn money, it is a different thing for those who make gambling as a place of entertainment.