"In the short-term, this is a bad plan because it would cut the Russian man-on-the-street off from international news and perspectives, leaving them with only what the Russian government chooses to tell them. That's not a great way to decrease Russian public support for the war.
In the long-term, this would set the precedent that small industry associations in Los Angeles and Amsterdam would be playing arbiter in international conflicts, and messing with countries' supposedly-sovereign country-code top-level domains.
And if that were to happen, a lot more countries than just China and Russia would secede from the common-consensus-Internet that allows us to all talk to each other."
[1] https://en.wikipedia.org/wiki/Bill_Woodcock
[2] https://twitter.com/woodyatpch/status/1498472865301098500