NSA is also responsible for establishing computer security practices for the rest of the government to follow. That they don't eat their own dogfood is damning.
There are likely many conflicting departments and teams within NSA. Many are probably trying to fight for the public's security and have for years, with cryptographers earnestly trying to develop secure and efficient algorithms. They are probably at odds with the other forces in the organization that seek to play the espionage game, even if it puts the country at risk.
Directly at odds. I don’t believe you should encourage anyone to trust known espionage. If it’s good advice, someone else will say it too you can trust independently.