Never?

If Jason Bourne is after you that's probably true. If you're worried about border security, that's maybe true.

But for most people, the lock on their phone isn't protecting them from the government, it's protecting them from nosy relatives, a pick pocket, or the guy that finds the phone you left at the bar, or their 4 year old. None of these 'attackers' will ever be sophisticated enough to defeat the biometric protections on an iPhone.

I think people need to adjust their security policies to reflect the actual security threats they're likely to face, and for most people Touch ID or FaceID are more than adequate.