I guess, there is an adage that says "one man's food is a Poison to another". Alot of people derives joy in gambling, while some takes it as a daily way to earn and also loss their funds. Just because you've made up your mind to stop gambling don't mean that others should stop. Everyone has a choice in life. How you decide to live today will tell your tomorrow so everyone bears their own problems. The only problem that comes with gambling, is it's addiction as someone who never tried it before decides to try for the first time and then "boom, he cashs out a huge amount. You don't expect such person to stop gambling. This will make him or her, to try more even when he encounters losses.
Please let's correct that statement about taking gambling as a daily source of income because it's really an impossible journey for one to actually think that he or she can make daily earnings from a casino and thats why I don't ever support such statements. Although gambling is seen as different view for different individuals but the fact still remains that it can never generate income on a steady.
Casino isn't all about gambling, there is also investment and job opportunity. So if someone states gambling as source of income, it can be possible that the person is working for a gambling company. But on the context of gambling as in wagering and winning as a source of income, I would also state that it is not sustainable in the long run. Although there are some people who manage to win more frequently than lose, there are way more people who lose their money in the long run.