A pro gambler knows that gambling is just entertainment which they can make money so when they think that everything is gonna change, they can leave the games anytime until the situation can be like before.
Yes, the curiosity will be something that every gambler have but that will not become bigger if we can control ourselves.
I work and earn money to get rich, well I do not get rich with that neither but I can pay my bills just fine, it is really a cool thing to realize your work is your work and your entertainment shouldn't bring you any money. I realize that gambling is different and there is a CHANCE of you making money. However if you keep it going then you will just lose that too, so you would have to stop gambling as soon as you made some profit, which we all know nobody will do.