I do think that gamblers who take gambling activities seriously have their motivation come from the amount they envision and hope to win, hence why they remain persistent in gambling instead of quitting after winning a little.
A gambler with a winning amount in mind, gambles much more and can become easily addicted than a gambler just gambling for fun and without a particular winning amount in mind.
In essence the thought process a gambler focuses on during any gambling activities will determine if such a gambler would gamble much more or lesser than normal and also, if such a gambler would become successful at their gambling endeavors.
What are your thoughts?
Well there's nothing wrong with being optimistic sometimes people attract the positive vibe on it so they keep looking to win a large amount but of course it depends on the person how they will handle their games at all, but not all story have the same ending so if you think that time is not for you there's nothing wrong to turn around for a while if you think you are not lucky for that day, being greedy and hopeless to win a large amount or even take back their money might reason to fail your game instead to lose more.
Of course, being optimistic is good in anything where it can improve your mood when doing anything, but of course it doesn't mean we have to lose consciousness, because being optimistic can certainly make someone fall into overconfidence, meaning that awareness of the possibility of risk must be maintained which can limit you from various decisions that you cannot be held responsible for.
However, we must understand and maintain the understanding that confidence and hope will not be able to change the results in the game to be according to what you expect.
On the other hand, as you suggest, it is very good that when we feel that we are far from luck for some reason, such as a game that is going very badly, then clearly stopping is a wise and best decision.