Hmm. It is a lot to think about frankly, a very large topic. My gut reaction is no, being a global net is what makes it robust and enables so many positive outcomes. I would say more positive than negative. I also feel as though the expectation that the internet is global is what protects it from nation states themselves. It would start with an obvious win, like banning a country due to cyberattacks, but would it stop there? Would we eventually start disconnecting outselves into dozens of small nets, little bubbles of thought compliant citizens happy on our protected nets, unable to share information across borders except through sanctioned channels?

I am just thinking out loud, I don't have the answer and you raise a valid train of thought.