Fedi is inherently broken.
What is to say Nostr isn’t?
Because Nostr is still very early and now's the time to enhance, build, or change it. ActivityPub is from 2016 and much more set in the ways on how to accomplish tasks and features - it's more mature. Nostr is more malleable.
It was also a poor name choice
SMTP, POP3, FTP, HTTP, TCP, IP, UDP, all have the best names.
I loved POP3 tbh