Well. We can't absolutely state he's 100% wrong, can we?
Because one of these days. Yet another mass killing of some kind occurs. And the target(of course) is using an iPhone. And he's either dead, or smiles and refuses to open up the iPhone. And whoops once again the iPhone is showing the screen "you must enter in your PIN to enable TouchID".
And Apple goes sorry but...we can't help now. There will be some point where the US govt will go alright enough is enough. You either help us willingly, or we'll make you help us, unwillingly. And if you refuse, hmm that's a nice trillion dollar company you have there, wouldn't want to freeze all its assets would we.