making gambling as a career is possible, but if we are just users who are quite far from the words career, instead of calling it a career it is better to say successful gambler, there are many people who are successful and become rich because they work in casinos, maybe that's because the skills and abilities they have if they have a career in casinos, of course they work and get paid
OP was never asking or talking about making a successful career in casino business, or working in the casino itself, of course owning and running a casino is a big business on its own, anybody can make a very successful career off this, and working in the casino and getting paid can make one a successful person too, since casinos do generate alot of money, and the generous ones will definitely be paying their workers handsomely in order to ensure that they are comfortable and happy.
But what op was talking about is, making a successful career as a gambler, and my answer once again to this is that , gambling is not a career and should never be taken as one, and to depend solely on gambling for all your money needs simply means that you will have to know how to cut your onions, else, you will be rekt before you say jack.
Yes, it is true that the OP is not talking about the casino business itself, he is only talking about someone who can make gambling their job. In my opinion. This is too risky and it is better for us to understand it by working in the casino itself because we can become employees who get paid for sure and the casino definitely provide a large salary compared to having to gamble where the income is uncertain, but how can you work in the casino itself?? or you can create your own casino business so of course this is more fitting with the title of this thread Casino business is a career and only then can it provide benefits and advantages to the casino owners and employees themselves and not for the users.
Of course, I also don't agree that gambling is not a job because it is just a game and the risk of losing is greater, unlike other jobs which provide definite profits, gambling is just entertainment and should not be used as a job for gamblers out there.