Sin it can only be for religious fanatics. For me, this is a great opportunity to have fun and win a good amount.
More like great opportunity to lose your money and be pissed of about betting your money. I never found gambling fun at all. I doubt that most people do. Most people are just there hoping that they are going to go home with money. Tons of things can be done to have fun, maybe not earn money though. Gambling addicts are greedy. And being too greedy or too addicted to gambling will lead to you doing things that you're not supposed to like stealing money from your family just so you can gamble. This is a sin. Greed leads to committing sins.
I disagree with you. I know a lot of people, me included, who don't see gambling as a source of income but who enjoy the fun it brings. But you are right on the part that being greedy is a bad thing. But again gambling not necessarily leads to being greedy.
Yes. Just enjoy gambling and you will be surely not going to be in a lot of trouble. Specially getting addicted to it. It can't be a source of income because we will not experience a regular winning on gambling, unlike if you have a job that pays you regularly. Just enjoy the game and it you lose don't chase it because that's one way you are going to end up addicted to it.