That's what should be done to make gambling just an entertainment game and not be used as a source of income let alone a full-time job, I think it's also strange to talk about that because it doesn't make sense unless those who want to make gambling a full-time job are at least someone who have businesses that generate money to fund their gambling.
you are right, that gambling cannot be a permanent job even though the gambler has no other job and gambles all the time, but gambling can be used as a permanent income or passive income for business people who have funded casinos because investors definitely get income from daily and even monthly gambling profits, because they only receive profits but they never gamble.
so they have made the wrong decision to make gambling a permanent job, gambling cannot be used as passive income because the ratio of losses will definitely be higher than wins, gamblers do not even recover losses let alone earn passive income from gambling.