What happens is that when they lose, they will quickly stomach it but any big winning will make it to every news headline and when the uninformed read this news of how $10 made some $10k dollars, they will keep playing and hoping to be as lucky as the one who has made the fortunes through gambling.
Addiction is not age base and it is respectal of no man. If you are not disciplined and responsible, you will surely be addicted.
I always say that you are predisposed to take up some sort of addiction, whatever it may be, based on whether you have a strong or weak character.
If you have a strong character, you will hardly get caught up in any addiction.
then if you have a weak character, maybe you don't get involved in gambling, but you smoke or drink or worse