There is no good because we don't even see the good side of gambling. Why? That's because all things that appear in our mind are meant to make us win and be rich.
But if we think that gambling gives us happiness, that surely becomes satisfying and entertaining. Unfortunately, most gamblers gamble for the sake of money, and all of their losses make them picture what gambling is all about.
If you see a gambler talk negatively about gambling, you will find out that he's in trouble already. And what he/she did was blame the casino for their situation.