You are effectively saying that Nostr can be anything, but it can't, not unless the clients with most market share options in, but if that is to be taken for granted, then Nostr can have Pkarr IDs and Peergos data model etc. I wish that was true, but you can't have both decentralised development and agility at the same time, the more independent clients the more ossified the development becomes, this is an old story since Email failing to get any end to end encryption, while Signal doing it in few years.