It can be done, but it should not be the objective of anyone to get money from gambling is a consecutive way. I have a friend who does not gambler in a regular basis, he was invited to a big casino in the city where he lives in nowadays. He played blackjack a couple of times and ended up winning around 25$, to this day he has not gone back there and gamble again, because it is not something he does regularly.

If we only take a look at the numbers, he actually made money from gambling, so it is technically possible. It is a completely different thing to life off gambling or expect to solve one's problems using gambling as a tool to do so. It can be easy to understand to us, but unfortunately in this planet one can find uneducated people who has not been talked about all this, they only payed attention to the big wins that are advertised on TV.