I think one of the major pull about casino is not you'll always have the chance to win since you'll have an equal chance to lose, but the probability of using a small capital to win big amounts.
Though how many people and how often these people win big is up for intepretation.
So what makes these people keep coming back? The psychological effect of winning is so big that they will remember winning even if it's for that one time and they will keep going back to rekindle the memory of that feeling.
But it will never be the same. They will never be able to achieve that emotional high of winning for that very first time unless, unless they hit the jackpot or an amount they never fathom they could win. That, will be the new psychological benchmark.
This makes losing acceptable. It's part of the process, you win some you lose some. They will console themselves. Always. That's probably the reason why losers are not quitters. Even if they have to borrow or beg, they will return to the casino floor.
The gravity of winning overwhelms their ability to control their lust.
