So my question now is that can someone use gambling as a means of earning living?
Yes, you can make a living from gambling. Even though most cases occur in the midst of society, on almost every occasion the gambling house always wins. You have to be a smart gambler if your goal is to gamble for a living, when luck is coming your way, don't force it to get more. Stop playing for a while, then put some money aside to take home. You have to be able to control your emotions when you are losing and don't be greedy when you are winning.