It's hard enough for their parents to enforce these decisions. Good luck with that.
https://www.youtube.com/watch?v=YM6hEOtV92E
When kids game excessively, I'd wager it's an escape for them. It's an escape just as much as it was for the geeky / nerdy kids of America, as it is for the kids in China who have goukou.
You can try to enforce whatever culture you're gonna enforce, but I think we've seen from the war on drugs that these kinds of things don't really work. There's always some deep psychological and/or physiological deficit whenever there is an "addiction" at play. And you're trying to treat the disease by treating the symptoms. You can try to tighten control so that you can try to force that "ideal" society, but when you do that, things have a way of becoming authoritarian in a handbasket. Everything messed up about China is about socialist idealism turning authoritarian, and you can say that about other countries too.
People should have figured that out when they did that study on rats, where the rats that lived in some enriched environment, with plenty of playtime, did not get addicted to sugar water the way that the rats trapped in cages did.