Also when they are not gambling, they are taking risk too because who knows that they may win big amount and this may help them improve their life style.
It's a tough situation to be in and if you are one of those who can afford some money loss, then I must say that you are privileged.
I do not think that there is a risk at all if they dont gamble. It is much better if they do not gamble at all so nothing to chase with.
And that is why if a gambler do not gamble at all, I understand that some may think to gamble and think of the past losses and they might try again. But if they do, that is already their problem.