The author suggests tiers of security, where the biometrics would only unlock the first tier. Isn't that how it already works? If I'm not mistaken, certain oper

The author suggests tiers of security, where the biometrics would only unlock the first tier. Isn't that how it already works? If I'm not mistaken, certain operations like changing the Touch ID fingerprint or passcode require you to enter the passcode first. And changing the iCloud information requires the iCloud credentials. Isn't that exactly what the author is asking for?