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Gambling will let you win but most of the time you lose. One thing I realize from this game gambling will never ever lead you to a successful life it will only make your life miserable especially when you were not giving limitations to yourself. My mother and father is a a gambler so I know the situation of being a gambler because that what I observed.
There are actually people who are considered successful gamblers and gambling was somehow their profession (there's a thread here about it). But it surely took them a long time before being an expert. For ordinary people, there could be a tendency that they will loose their sense of self control and the result would be a miserable life.
I think it's good that you know the situation of a gambler because of your parents. With that, I'm sure you want to be better than them. Not as a gambler but as an individual.
What makes them become expert because they solely focus on gambling and spending much time in there. They were destined to be a gambling professional and actually they love what they are doing. Just like in basketball, if we want to become an MVP, will have to show that we are capable to be like that and we really have talent that could enough to compete the others. Sports needs knowledge and skills the same thing we have to acquire also before gambling.