Smartphones have other uses, but more importantly forcing anyone to comply with this rule is gonna make them want to disobey more. It’s the responsibility of the education system to educate ofc but also streamline education, make it easier. Keep their attention. If the kids aren’t distracted by their phones while they hate their school, I guarantee you they’ll find other ways to distract themselves. I’d be maybe fine with banning certain apps. I always say smartphones aren’t addictive, they’re useful. It’s apps that are designed to be addictive.
This is my favorite pseudoscience to shit on. Fundamentally the big problem with it is that there are too many layers of conplexity between psychology and evolution. You can’t ignore genetics and neuroscience if you want to look at how psychology is affected, IF it’s even possible.