That doesn't explain how they would get the update on to a locked and encrypted device, even if it existed.
That being said, I really WANT the data in this case. I hope Apple finds a compromise where they can help get this specific data without risking leaking a compromised OS.
I want pharmaceuticals without side effects, and real doughnuts that don't make you fat.
Seriously, you are asking for "A" and "not-A" in one sentence. Take your pick. Are you willing to get this one phone unlocked so badly that you would be OK with nobody having security? Because that's what you're asking for, whether you realize it or not.
Perhaps you are trying to disagree with a point by conflating it.