'I can't imagine a scenario where anyone would need more than 7x 
redundancy (except highly hated people like Alex Jones and Donald 
Trump).'

Well given that Trump  is running for president (no matter how much anyone hates him) I think this makes for a very strong argument against Nostr being hugly censorship resistant.  It would be easy for 7 relays to all agree on using the same censorship lists.   In fact I would say the ability for Donald Trump to never get censored on Nostr on most peoples clients would be the bare minimal needed to claim Nostr is actually censorship resistant .