Seriously...
CBS News represents the supposedly objective media, a major source of information for American citizens. For that matter, CBS News has represented the pinnacle of that group. Walter Cronkite was almost the archetypical newsman.
A lot more things have come to light other than those memos. This last item was just the most recent.
The fact that they are either easily duped, or promoting an agenda, or perhaps a combination where they are just too eager to push stories that promote their agenda to pay close attention, is significant.