It is just their problem, it is life, it is for strong Hearted. If they chose this way - they have to try themselves to become the best one. And it is true for everybody, who tries to become the best in his profession. But we don`t create threads like "Office man is for strong Hearted" or "The postman is for the strong Hearted". Everybody lives his own life with his own troubles and it is not correct to call one of them "strong Hearted" and others - common people.
I mean,.being strong hearted is highly associated with the exposition to risk and uncertainty and there are professions and situations in which one is more likely to experience risks than others, and we all choose to whether step into those situations or not, nobody walks into a casino held at gunpoint after all.
Though, I must say, as times become weirder and people seem to be losing their cool easier as life becomes harder, it will take us all to have a stronger heart to continue to go on as we usually do in our life.
I have seen people in my family suggesting life is a collection of struggles, and those who gamble and become addicted to it are just adding unnecessary struggles to their life. At leastz that is my point of view, hence why is important to keep control over what one does while logged on the casino..