It's the very reason why a less fortunate person should not even start gambling. It's not a place where you can make money out of hard work, it's a place where we also risk our own money to make more or lose more.
As a matter of fact, I think anyone gambling should always have the mind set that what they are playing is a game of luck and not some sort of investment that can guarantee a certain cool APY. Gambling is not a side hustle and not also a source of income. Just last week, I lost more than $20 in different bets which among all my bets last week, I didn't even win any one. So, does it mean if I took it as a side hustle or source of income, I will even be disappointed as well, but I don't.