I think majority of those who have ever tried gambling can be divided into two categories, those who got interesting in gambling (due to fun, earning, emotions, any reason), and those who have tried and never find any interest in it. So no matter how successful or not people from first category gamble, what people tell them or suggest, what opinion on gambling is or what is their financial situation, they will still gamble and return. Some just do it more often than other, more reckless than others, more addicted than others.