Many clients already do that. There are only few that are still in the old model with a list of bootstrapping relays. I think you are stuck in the past. Bitcoin nodes already do too much to be bothered by Nostr events. They shouldnt be used for this. There is no need to destroy the money layer with social media posts. But feel free to code your P2P nostr network. I am building mine as well. Its a good layer 2 for the relay network.