> Apps tell Safari in advance what kinds of content to block. Because Safari doesn’t have to consult with the app during loading, and because Xcode compiles content blockers into bytecode, this model runs efficiently. Additionally, content blockers have no knowledge of users’ history or the websites they visit.

This is the same change that ManifestV3 brings - ad blockers can no longer run code to determine if they get to block content or not, they have to supply lists that the browser applies.

If you're getting good results that just means you're using good lists.