When we gamble we feel all the emotions, like when we feel excited when we are chasing our losses, feeling happy when we won a big amount, feeling depressed when we lose and we feel frustrated when what we expected to happen did not materialize, this is one of the reasons why we cannot stop gambling because we feel all the emotions.
But at times, the way we handle our emotions matters a lot, because it's not just all about feeling it, but been able not to allow your emotions make you cause harm to either yourself or those around you. Because I have seen a situation whereby a man gambled with all his life savings, and when he eventually found out he lost the game, went and committed suicide and died, living his poor wife a widow with kids to take care of (I.e responsibilities).
So in the notch shell, our ability not to allow one mistake made during gambling to affect our life matters a lot