One person probably works on the calculator app and probably only when needed (literally the app had probably not even been touched by an Apple developer since it last got a “redesign” prior to the iOS 11 visual redesign.)
A whole team works on FaceID and is the cornerstone of the device security, that took many years to develope.
Not even remotely the same or comparable.
No bugs or security holes ever been found? No bypasses of lock screens or anything like that?
People can’t have concerns?
And you know what... first implementation of Touch ID didn’t work that well. It took some software updates.