They have far more information and understanding regarding our enemies than we could ever have. What makes you think that you could possibly be qualified to comment on the necessity and efficacy of the program when you lack the experience and day-to-day responsibilities that they have?
Would you trust grandma with cybersecurity? It's the same principle here. No one here knows anything about national security and defense, so maybe we should stop judging programs that have been deemed to be extraordinarily effective when deployed against (non-citizen) enemies of state.
Obviously, the discussion gets a bit thornier when citizens are involved, but that is not the case here.
A foundational element of democracy is that government functions are accountable to the citizenry.
Ah, sorry I didn't catch the Socratic Irony you were employing until you served up this meatball.
This is the part where the interlocutor points out "but the first time most of us even heard about the Disposition Matrix was when it was used against Anwar al-Alwaki -- a US citizen!"