Keep in mind there are two types of players when playing gambling. First, those who play with the aim as entertainment just to let go of tired after work, they play naturally and even when getting defeat is not a problem. And secondly, those who play with the aim of winning, they do anything to achieve victory including spending large capital so it is not surprising if they are disappointed or regret when at the end of the game has not yet won.
And should when they have experienced disappointment and regret makes them stop to play gambling, but what happens is the opposite they are increasingly rising to continue to play.