Actually that is what we should do but unfortunately, not many of us can really leave gambling forever. Some of us still go back to gambling and play our favorite games, although some don't often gamble anymore.
In my opinion, those who leave gambling are the ones who have only lost their money in the early days. The next are those who make a profit but lose everything after greed takes over them. The last ones are those who have lost everything because of gambling addiction and now want to leave it. Other than that I have not heard anyone leaving this addiction so easily.