You do get to question the reporter who used the source, and they can be held responsible if it's shown that the information from their source is false. Stop making it sound like there's suddenly no recourse agains defamation just because an anonymous source is in the picture.
And you haven't really addressed the main point: no anonymous sources means less information; why would you want that?
--
Okay, I guess I'll just take your word for it, guy who demands that the press be more transparent and accurate.
What has any of that got to do with anonymous sources? You're just vomiting a bunch of unfocused hatred of the media on a conversation that's about something more specific. (The president appreciates the assist.)