Effect on gambling is depend on you, how you use gambling in your life.
If do you use gambling to play in gambling to get a lot of money. It's wrong, because gambling is not a job but an entertaiment.
You're right gambling isn't a place to earn money because there is no guarantee that you will earn something at the end, it might just cost you a lot of money if you end up betting all you have. It is only for fun as what most people say but we must also control ourselves when it comes to spending our money in gambling.
Gambling is not basically a place; it is a game which is done in some sort of casinos which are the places in real means. But I understand what you wanted to say. Yeah! Gambling can never ever become a source of income because it was introduced just for fun purpose while the people made it as a source of income and portrayed everywhere that everyone can easily earn from gambling.