Isn't that the point, though? Touch ID was a major security feature (industry-changing even) that was added to the phone without changing the behavior of users.

Isn't that the point, though? Touch ID was a major security feature (industry-changing even) that was added to the phone without changing the behavior of users. It's nearly a perfect scenario of adding an incredible amount of functionality for users without requiring them to do anything. Apple has always been about user security regardless of whether or not it was obvious to users.