Most gamblers find it hard to stop gambling when they win huge amount, even those that were lucky to cashout from jackpot also find it difficult to stop. However it's just the greed in humanity, if we achieved what we have expected or what we don't expect at all we also see it as a good means to grind for more. It's just to understand that we can't continue winning if we are not losing.
Whether it's a really big win or a big loss, gamblers find it very difficult to take a break from gambling at that point. They try to make more wins there while others try to recover their big losses. But if gamblers can take a break during those times, they can keep their money and those who lose can get rid of even more losses. This type of behavior common in gambling turns a gambler into an addict. Which can definitely be a threat to any gambler. A gambler can be considered a responsible gambler when he can stop himself from winning more or losing more.
Maybe I would say that you are discussing two types of gamblers here, where the first is those gamblers who have entered a cycle of addiction so that it is always difficult for them to stop in any situation, win or lose. And the second is the gamblers who from the beginning have understood what and how gambling really is so that they know what to do in every situation such as stopping at the right time, especially taking a break when experiencing defeat.
I think we can judge which is better of the two types of gamblers, and clearly the second is much more recommended, or what is meant is being a gambler who understands in general what gambling is and how winning and losing work is something that is more recommended for a gambler to have, because only by having this proper understanding will we avoid various significant negative impacts.