This is predicated on the false assumption that those organizations are neutral arbitrators of facts, but they aren’t.
They might have a better gauge on reality than OAN, or PatriotEageNews.ru, but that doesn’t mean platform moderators should present them as if they are the source of universal truth.
People can be critical of posts and comments and their sources, without the heavy hand of moderation from the privatized Ministry of Truth.
We don’t even have to look very far back to see how platform level “fact checking” systems are used and abused to silence and suppress information goes against mainstream narratives or is politically damaging.