I don't see any reason or whatsoever that will make someone to choose gambling as a career like is such person insane or wants to have mental disorders? Like no matter how much you win in gambling, it isn't enough to discard other ways of earning an income and become dependent on gambling, a game of uncertainty? Like you win now the next minute you lose and you want to choose it as a career? Hell no, gambling should be played with carefulness and no matter how successful you've become in gambling, it isn't a prerequisite to guarantee you  a successful career in it.