I would like to believe there is a future where blocking access to the internet is unilaterally impossible. Major powers being able to pull the rug on what has become a foundation of modern society like this is too scary of a thing to allow. What could the answer be? Satellite-powered relays and DIY-able user devices to talk to them?
The real question is how you do this in a way that doesn't encourage one-sided propaganda, sybil attacks, etc.
I'm reminded of systems like Secure Scuttlebutt and the Othernet satellite transport. https://othernet.is/
I know the internet is fundamentally two-way. It seems there's always a few competent users who know how to get information out of a conflict zone or disaster area... getting information in beyond a few choke points seems to be the hard part.