If you're going to gamble, do it for entertainment, not for profit.
It's a fallacy to believe you can actually make money/profit off gambling. The odds are always against you, especially when betting against the house.
The problem with some gamblers is that they believe that gambling can make them rich. Yeah, maybe it will but you need to spend a lot of money.
Some gamblers are gambling just for fun only or stress reliever but some are doing it for profit which is bad.