The people who are building nostr said this and I believe them 🤷

"It doesn't rely on any trusted central server, hence it is resilient; it is based on cryptographic keys and signatures, so it is tamperproof; it does not rely on P2P techniques, and therefore it works." 

 What you read is correct, you're just applying it out of scope. Bitcoin is p2p electronic cash but the participants also don't need to communicate p2p.