Can you think of a better location to place a phone's unlocking and cloning machine than the TSA's examination office? Do they really need to teleport the phone?
It's unlikely to be a push-button machine. It's more likely to be a complicated procedure involving desoldering chips and placing components in specialized harnesses, which would be difficult to replicate at an airport.
That's a difficult thing to cite, I would say it's more along the the lines of the saying "There's no such thing as non-buggy code" or "there's no un-hackable system."
I get it, burden of proof. The blanket statement by OP also doesn't consider the ol' "baseball bat" ceiling of hacking strategies - at what point is it easier to just break someone's fingers until they tell you what you want to know?
For every other phone, Google is your friend.