Success in gambling only happens in times of winning legacy, but if you're not blessed and lucky with your playing journey I think we can't find any success with it. Try to have mindsets of treating gambling as fun activities and not for profit gaining source. Consider gambling as recreational activities that provides us happiness when we're diverted from our daily stressful work if we have regular job.
Some say they became rich in gambling, so I think that depends.
Depends on the game they are playing and I think the most ones that became successful because of gambling is the one betting on lotteries. I know a person that won in the lottery and built their own business in our town. I think they are lucky enough to win the lottery but in terms of them getting rich, that is the skill since most of the gamblers that won in gambling either lost their money in a certain way or they die, that is the curse of winning in gambling.