Atproto apps are not like an RSS reader that runs on the users' computers and connects directly to the sources of content.
Atproto apps are servers that control, filter and shape the content they serve to readers.
Atproto apps can censor, shadowban, show ads, algorithmize the feed into anything it wants. The user is powerless and the creator is a victim that can't do anything besides crying.
The fact that any person can host their data anywhere is completely meaningless since they have no way of distributing that data.