Two things that play on a gambler's mind if he is going to do this, and these are greed and envy, especially if the gambler happened to be a newbie. Gamblers have one time or many times had 
their ego provoked if people they know hit huge wins; some gamblers had a hard time accepting the fact that others are winning easily while for them it took a lot of betting to win; they are driven with the thought that they can do better and had a better strategy.
their ego provoked if people they know hit huge wins; some gamblers had a hard time accepting the fact that others are winning easily while for them it took a lot of betting to win; they are driven with the thought that they can do better and had a better strategy.You are right, the next question will be, 'why him and not me? And they will decide to try even harder, there are two sides to this though, it is helpful if you are watching a friend who is doing his best on everything and you want to surpass him too, this can make one to break boundaries and go far in life, but not in gambling, you will only end up hurting.
Some people also takes this too far, once a hated person get so lucky they will start to question themselves, because the feel they are better than the person they hate, and they will end up putting themselves in an uncomfortable situation, could go very bad or very good especially with gambling.
In this world most things won't go as planned, heaven has its way with everybody, and even if we are answering the same name our fate won't be the same, others are lucky doesn't mean you should too, the day a soul realizes that he or she is different from others is the day they will start seeing things differently.