Haven't meet one, but i have lot of friends who loves to gamble but turned out to have a miserable life in the end. What my perspective if you're living through gambling, i think everyday is living at the edge for you. That path maybe full of hardships and loss, i can't imagine how one can feed their family through that lifestyle.
Having gambling as our main source of income or considering it as a profession is really a risky choice and we might lose everything in just one wrong click. There's no guarantee of winning in gambling no matter how good you are at it. That kind of lifestyle couldn't make a person rich for life. It's still important that we'll still have a stable job and enough savings before we gamble.