If anyone says they make a living by gambling, they are definitely lying.
Gambling means luck and it is not possible for a person to be lucky all the time.Even if it is a game played with knowledge, luck is definitely required.
If you try to do this with sports betting, you still have to be lucky.
In short, I never believe that there is such a person. Sometimes people get lucky and win well, but sometimes they don't get lucky and lose a lot.
Not all gambling is all about luck, some of them has more to do with other things than luck because with the right skills that some people have, they can make use of it to make money from gambling. Sport betting isn't all about luck but also experienced because after knowing more about the teams playing,you can make correct predictions and not only depending on luck but most people claiming to be living off gambling are actually lying but there are some people that can be lucky to be living off gambling effortlessly. Some people are very lucky that anything that they're doing, they'll be winning while the rest of the others doing the same thing aren't being as lucky as they're getting. I have heard of people that have won the lottery multiple times and with that money they can live comfortably for a very long time.