The report is more about school age children while your points, while relevant, are more about late teenagers / young adults. Better reasons for why school age

The report is more about school age children while your points, while relevant, are more about late teenagers / young adults. Better reasons for why school age children are so addicted to social media are more car centric suburbian developments and the general attitude shift to not let children play outside without supervision. This isn't for cultural reasons only, it's also caused by the increased homeless population and the drug epidemic: in many places, streets are indeed more dangerous than they used to be 40 years ago.