Because of 2 reasons:
Those are not the only reasons why people gamble.- Out of greediness.
- Hoping that their money will double or triple in a quick and easy way.
Personally, I spend a lot of time on gambling websites and online casinos just because it is entertaining and I have fun being there. I don't spend too much money though.
I spend few bucks daily, therefore, it doesn't matter if I win or lose. I just enjoy it.
Or you continue to play other gambling games and learn from mistakes.
that would be the most stupid thing he could do, hope he doen't listen to you 