To be able to stop in time during a protracted losing streak, you need to have good discipline. Unfortunately, not every gambler can well control their emotions. Too keen a gambler is more likely to lose their entire deposit trying to break a losing streak, rather than admit they should have stopped at the very beginning.
I understand what you mean, this ability or rather this sensitivity to stop when things go too badly is not an easy thing nor something that everyone can do.
everyone thinks, things have gone badly up to now, fortune must change and often they ruin themselves like that