Listen, even that few percent you are talking about is just a mirage because there is absolutely no person that gambles comfortably with all assuraty of winning and making it a means of living. I believe gambler that do this are already develop in their real life career and are already making millions of dollars just like the way drake the musician and other celebrity gambler are going with their gambling hobby.
If someone if freaky rich like the celebrity Drake and other big celebrities, we won’t call their gambling games a career to them. It will just be like a fun game to add to their bags of money in their account. If all celebrities wants to become gambling addicts, most gambling sites won’t be able to contain them because they will likely want to go bankrupt because of the amount of money they’ll put inside and at the same time what they will get as their profits. Gambling is not a career to them but just a side hustle for them.