A gambler needs to be clever enough to know when he needs to quit and when he needs to continue playing. Without thinking quitting the games and without thinking keep on gambling is not the solution.
Sometimes quiting would had been the best solution as if you didn't quit, you can lose more money. Quiting to fight another day saves you and not make you a coward therefore we don't have to follow others advice but do what benefits us as not everyone is lucky when gambling.
A gambler should be able to identify when he isn't having a good day and quit to save money instead of been ignorant and continue gambling. Your mindset shoudn't be all about making money when gambling but also not to lose money by doing things that would make you lose.
You quiting doesn't mean you lost, those words are meant for something else like your dreams that's when you can say those words and not when you're gambling. Gambling is a game based on luck so you can't keep playing when you're losing and expecting a different result.