Because the FAA is "responsible for the safety of civil aviation." They don't get to say that, and accept tax monies for that, and then throw up their hands when someone else tries to block them from doing their job. The director (or whoever heads the agency) should have resigned, alongwith the entire rest of the management. Instead of being content with letting someone else take the blame when the next accident claims 100s of lives.

Imagine if you were tasked with making sure that your app's customer's data were safe. Your boss goes against your recommendation and does something you know will put sensitive data in the hands of hackers. What would you do?