Because younger people are much exposed to negative things now compared before. Our culture is also different and the source of information can be acquire anywhere using different types of technology. With this, younger people has more advantage and gambling is the one they have learn through this.
It is true that most of today's addicted people are the young ones because we all know that the young ones are the one who are most exposed to todays negative things. Young ones are the one who spend their time playing games, playing outside and worst is playing gambling. They didn't think of the consequences they may take. I believe that parent's must be aware on this to help their children and guide them.