the only reason to become addicted in gambling is the expectation to make money. but in fact gambling is one of the most difficult job of the world therefore most of the people cannot make money in gambling and they even lose their own money.
Actually in most of the underdeveloped or backward countries the unemployment factor is more than modern countries. Actually such people who disappointed from finding job for themselves, they start thinking about find such kind of ways through which they can make money in short time so gambling look like to them the most easiest way of making money which turn them addicted.
Seriously do you even live in such third world country to even know such thing? If you have trouble in finding jobs and making money to feed yourselves, there is almost impossible chance for someone to choose gambling rather than to do any job to feed themselves, it is more likely close to zero chance of its happening