@Op Obviously the gamblers win in gambling. But it sure that the winner is very rare than losers. Only some lucky and GOD of gamblers win sometimes. 
And when a gambler luckily wins a high stake then it makes more addiction in gambling. And this is the main reason for most of the gamblers are playing gamble despite losses.
The mindsets that if you are lucky for that day collecting money will be much easier for you, the only problem is when greed start to encircle around your brain, there's always chance to win if you know how to properly sets limitations and if you have contentment inside. And when a gambler luckily wins a high stake then it makes more addiction in gambling. And this is the main reason for most of the gamblers are playing gamble despite losses.Without control expect the losing portions of your day will bust everything that you've got.