The only advantage from gambling is that if you win big, you become rich overnight, which is not possible by doing a job or by having a own business, but if you loose, you loose everything, its better to stay away from gambling.
This on is true, may be you can be millionaire just in one night and your life is start to change. But if you can't control it you will still lose everything but if you can control losing some coin is not a problem too because you just can earn it back again and keep trying to gamble again. And most of this thing is just matter of luck whether you will win it or lose it
You also need to risk a lot to have the chance to win a million. Also there are countless examples in history of big time gamblers that borrow tens of thousands of dollars to gamble, win several millions in a couple of sessions only to lose it again over the next weeks because they couldn't stop even when they were a millionaire.
The advantage in gambling is always going to be at the house, but the times you win and know when to stop are when you can have your advantage.