It still amazes me that no one really cared about this.
That is an inaccurate statement. Dan Rather did not forge the documents. IMHO they would have been even clumsier forgeries if he had.
At worse, Dan totally neglected to have the anonymously sent documents vetted. That makes it gross incompetence on his part, not malice. Not to say he isn't malicious, just that his total lack of honesty and integrity were more important in this case.