Being addicted to gambling does not automatically means one is a bad person or one is capable of bad things for the sake of money or continue to gamble. It just only means such people have a problem which they need to address carefully and as soon as possible, so psychological symptoms won't get worse as time goes on.
There are good people who are addicted to gambling and yet try to fuel their addiction by working extra hours, getting more works to do and even selling their assets. Addiction itself starts to turn one into a "bad" person when we start to mistreat ourselves and others for the sake of fueling our habit: quitting jobs, stealing money, defrauding people, among other things.