You have made a good point where today's young boys and girls are not doing their primary level studies just for mobiles. Young children are so addicted to mobile that they spend most of their time using mobile instead of studying. At present, if you want to use mobile apps, ads from gambling and casino sites come from every app, so seeing all those ads, young children create a kind of curiosity about gambling and casinos. And from this curiosity, young children become addicted to gambling and casinos unexpectedly. So no matter how much awareness we as Guardians are currently raising about gambling, until we can take mobile phones away from young boys and girls, we will not be able to protect children from these dire consequences.
First, if you take away kids mobile, you will turn into their enemy Nr1. This is not just a device they use all the time, this is how they socialize. Take away mobile, and kids would laugh at your kids and bully for that. That will create much more harm than potential gambling addiction.
Second. You dont have kids and dont have much experience how to raise them. Taking away, banning - this is not protection. This is postponing problem and pumping it. Why kid must be punished (by taking away mobile/toy/their social life), if parent isnt able to explain what gambling is and its consequences. That parenting fail.
Third. When they spend time in mobile, they learn also. They gain communication skills, train their creativity, bunch of other skills. Why do you think that kids must learn all the time? Childhood is not an army, when you wake up, learn, rest (by reading), sleep, repeat. A bet when you was a kid, you did maximum not to study.