I think people get the addicted because of the profit that gambling could bring to us. It's really easy money and fast.
Agree this is the most reason why people get used to it or get addicted to it because first the people really want an easy earning of money with just a second or just a matter of time without really exerting a lot of effort on doing it. In gambling just play then you can win a lot , but if you are not lucky enough youll end up lossing a lot too but though you could loss a lot still there are playing or doing gambles.
Nowadays, people want large amount of money without doing any hard work and they see no way beside gambling which can make this dream come true. It is also true that gambling can give you huge amounts of profits in shorter intervals of time but the thing is that the money you have earned is not yours. I mean to say that theres no surety how long it will help you because you lose this money in next game.