It depends on the type of gambling a gambler chooses to do.
If you are good at sports, only do sports betting.
If you play poker, go for poker games only on casino.
If you feel you are lucky at dice games, there are plenty options and you may try crash games too.
The question is, how focused you are at building a career in gambling if that is what you want to do in your life for long time. If you can take small risks and have proper money management with good risk to reward strategy (you need it here too), then you can make a successful career in gambling. If you do not wish to gamble, there are other options too like creating a gambling website for a client, integration of crypto in it, providing customer support services and plenty other things to do to make a career in it without gambling yourself.
It lies even if you decide to focus on sport betting. I have seen stubborn gamblers in my life that don't just know when to quit, they will come back again even if they lose. I will not advice any person to choose career in gambling unless they want to start the gambling business, that's the only successful career I have seen people don't regret ever making with proper management.
Alternatively, use gambling career as a shortcut to gather wealth and pour that into another business you know you can handle, a time will come that gambling luck will fade away from you because gambling companies change a couple of one or two things and also do review on how players win their money, so that when you don't win again, you will have a place to fall back to again.