It's all about the entertainment and if you are living not surviving then gambling can teach you to man-up and get going.
I saw people discussing only issues of gambling but no one telling about advantage. So many gambling houses are coming up so is there any advantages to player or houses?
Gambling does not have a positive house edge so their is not a chance that you will make ROI in the long term
However if some bonuses are used or promos their may be a bit of a positive edge if your lucky.
how does bonuses makes the game +Ev ? has no relation other than that you are not losing your money.