When we as gamblers know the casino advantage, it would be good for gamblers to be able to limit themselves from losing more. It is true that gambling for fun would be better, but it will not work like that. Everyone still wants to win their bets, even though it is for fun, but there is still hope to win some amount of money. Certainly not for long term winnings, because as you said regarding the casino advantage.
We know we will lose more than we win. But there will always be a moment when we can celebrate victory without counting the amount of loss that has occurred.