Lack of self control is a big challenge for gambling. When you have self control, you are likely to do better but so many don't have self control because it is about emotion and attachment of resources losses.
That is what we need to concern when we are playing gambling because we can lose control, especially if we win some rounds. We can forget the rule that we made before we played because we are in the happy moment for winning the money. So no matter what our conditions in the gambling, we need to have control and still remember that everything can happen in gambling.