That is really the reason why gambling is very addicting at all because of the entertainment it can give to the gamblers.
And to be exact even a person already have money and yet he still gambles.
He doesn't think about winning at all as long as he enjoys.
No way entertainment is just the only reason, wake up man, we are not living in the past, we know that money is the real reason and because we are greedy by nature we want more money that we can even imagine, that why when we lose and win we don't stop.
Honestly that is me. When I lose more I get the feeling that I need to get it back. Keep raising my bet until I get my money back and some more for profit. It is just to wrong and cannot be stopped when youre in that moment.