Gambling is only so addicting if you are winning unless you are just gambling for fun. When i am playing poker i don't care how much i lose or i win because poker is my favorite game.
"Problem gambling is characterized by many difficulties in limiting money and/or time spent on gambling which leads to adverse consequences for the gambler, others, or for the community."
From my opinion the original is that everybody want to get rich in a day, everyone try to find the shortcut ways to reach their goals in short period of time, gambling is the only solution because we all think like that, so that by keep trying we get addicted of it and than no way left for us to do a good job in real life.
When we do greedy in gambling than we will be addicted person, because as you say, everyone want to rich and in a short time, so in this way, gambling is only one thing who help us, than we do gambling and every bet we think that in this bet i will be gotten rich person, but no one is lucky here.