It's pretty exciting, making a successful career in gambling. If what you mean is to make gambling a basic job to meet the needs of a day-to-day life and hope to live a successful life and have a lot of treasure, I think it's very difficult.
However, if you expect big gains in gambling, like you win the lottery or get other big wins, it's still quite possible. If you have a lot of money, maybe you can make a gambling site. As a gambling site owner, maybe this can be a promising profession.