The Stanford link is just generic information about the fair use tests and does nothing to backup the assertion.
> They aren't, in addition to facts they offer analysis, editorial positions, and so on.
Those opinions and ideas are also not copyrightable. Only expressions of them are copyrightable, which is why paraphrasing facts, ideas and opinions is not a violation of copyright.
> Fair use is filled with shades of grey.
Yes, but not all those shade are equal. There is a long history of litigation showing that paraphrasing news articles is fine.
> They aren't, in addition to facts they offer analysis, editorial positions, and so on.
Those opinions and ideas are also not copyrightable. Only expressions of them are copyrightable, which is why paraphrasing facts, ideas and opinions is not a violation of copyright.
> Fair use is filled with shades of grey.
Yes, but not all those shade are equal. There is a long history of litigation showing that paraphrasing news articles is fine.