Agreed.
"Activity Pub can also fulfill many of the same functions as AT. While Activity Pub servers are more monolithic making a “crawler” fairly impossible, there are several various Activity Pub server types (e.g. Mastodon vs Lemmy) that are mostly/partially compatible and would replace the need for crawlers. Throwing in user-owned account identification Activity Pub could also do everything AT can do."
https://nate.mecca1.net/posts/2024-01-30_microblogging-protocols/