How religious the country is will also determine their gambling habits. It doesn't matter how wealthy the people over there are or how vibrant their economy is, if the country has more religious population their gambling activities will be extremely low compared with countries that doesn't care much about religion. So this should also be put into consideration when deciding why some countries gambles more than others.
In some religion gambling is prohibited, and in this kinds of countries where their religion make gambling prohibited they will hardly talk about it talk less of involving themselves in that kind of activities (gambling). Even from my country there are people who gamble but it is not that popular because there are different kinds of religions in my country and each religion have their principles, practice, beliefs and also have different personalities and perspective. And one of their principles of some religion is that gambling is prohibited.
So also, in some religions gambling is a normal thing and everyone is free to gamble to the fullest without having any problems with others. The fact about life is that you will meet different kind of people in this world with different personalities but the most important thing for you to do is to focus on your goals and.