If people only read from 10 relays under USG control, nostr won't survive that. I have 3,881 relays in my gossip client relay list. Granted most of those are junk. But there are far more than 10 relays. When I advertise my relay list I generally hit about 100-200 relays with it. For sure some of those are in China, Russia, Iran, etc. So this situation isn't close or likely.