He is probably repeating same thing, whenever he notices he's lost lots of money while gambling. That doesn't make him irresponsible. I actually chuckled reading his response, in the sense that it could be his way of cautioning himself for spending so much money gambling. Since he's not worried on the development, he's all fine with it and nobody is getting disturb for his action. Then his reactions shouldn't be a trouble either. Gamblers have different ways of dealing with losses. Some time when I lose the reactions from me doesn't match my normal action or behavior. He only needs to find something else to make him feel happy when in such a mood. So that it won't eat him up in the process. It's always a thing we should expect as gamblers. Not all gamblers, though.