Earlier quoted context omitted.
What if another agency already has an NSL in place requiring exactly the same (backdoor, weak crypto params, weak by design secure enclave) and they simply are under a gag order to talk about?
NSLs can only ask for information, not force a company to build a product. That kind of request would have to come through legislation and apply to all US companies in a similar situation.
"Room 641A is a telecommunication interception facility operated by AT&T for the U.S. National Security Agency"
As long as you have a backdoor, and Apple does, shady government agencies can and do come knocking. We've got plenty of shady government agencies, and can never guarantee that we won't have more in the future.