No matter how expert one is in gambling, one can never guarantee winning or profit because in gambling it is not possible to win only through experience, luck is required here. So a person can never win from gambling constantly and can never earn a fixed amount of money weekly or monthly from gambling. So gambling should never be considered as a job be it part time job or full time. You can only use gambling as a fun place it will save you. Otherwise you will succumb to greed and become addicted to gambling
It is pretty true. It is not a wise decision to make gambling be the main job because we can't expect to earn money constantly in gambling. Most gambling games are based on the luck, it is very difficult to always win in the games. Although we already played the games for many years, there will be always no guarantee to win them. Sure, experienced gambler must have better chances to win, but it doesn't mean guarantee the wins. Because of this uncertainty, it is better to gamble as a side activity. Or to make gambling just for fun activity. Don't try to rely for monthly income from gambling, it is a very high risky!
One can take up gambling as a full time job if he gets a job in a casino company for live games like Live Blackjack, Roulette, Baccarat, Andarbahar etc.. Because for these the cassette site will pay you a certain amount which will be your job payment. So it can be considered as a full time job and you can continue it but investing your own money in gambling can never be considered as a full time job.