Does WebKit direct you to certain sites or block sites based on their content? Does it capture your search terms and curate the results? Does it aggregate content? Does it funnel your viewing to certain sites preferentially? No.
You keep attempting to assert that the viewing tool curates what you view with it. WebKit doesn't. Even if you raise technical points (doesn't support Web MIDI or something), those still don't prevent you from visiting any site you want. Even if a site were totally broken for technical reasons, it doesn't amount to deliberate curation by Apple.
Come on.