We still rely on ISPs and TCP/IP to do this. ISPs can flip the shut off switch...how's the connectivity in North Korea?

You are forgetting that 99.9% of the internet got tired of DDoS attacks and contracted one company to mitigate them. CloudFlare was called upon to deplatform 8chan, who then had to build its own DDoS protection. Hive uses it too and is vulnerable in the same way 8chan was.

As long as people take the easy way out by using big company bad actors like facebook for photos and cloudflare for every person that visits your site, there will be problems as governments crack down on people.