You think it is difficult to 3d print your face from a photograph? You can't revoke wetware, doesn't matter what you do on the device. You can take a picture of someone's palm from a mile away and ise their fingerprint to auth as them!
That's just it, you can get as many iphones as you want The threat actor will always be able to fool it once they have your biometric data. Even a human can't tell apart by using a photo if the 3d print is good enough. There will always be a way to mimick wetware.
https://amp.theguardian.com/technology/2014/dec/30/hacker-fa...
7 years ago too.