Nostr should beware. Outsiders level similar accusations of groupthink at us. I'm not sure they are wrong.
Take a look at the links below for a psychological explanation of why this happens.
https://www.lesswrong.com/posts/ZQG9cwKbct2LtmL3p/evaporative-cooling-of-group-beliefs
https://www.lesswrong.com/s/M3TJ2fTCzoQq66NBJ/p/yEjaj7PWacno5EvWa