Not only is luck a big part of the play but even if somebody is able to pull this off and make a living off gambling, it would not work infinitely.

It may work for an year or two or it MAY work for somebody who hits the jackpot and is able to retire early in life.  But if by making a living through gambling you mean people who make their own monthly salary earnings out of gambling, chances of this happening successfully over decades is close to none.  We all hit a low spot in life at least once and one thing you should NOT do is gamble when you are mentally or emotionally vulnerable.  That is one way to lose your money really fast.