Sure, at this point Apple's solution likely works this way: they care about their reputation. But even a secure faceid opens the Pandora box: today it's just iPhone users, 5 years later it's everywhere, including in solutions from Huawei and 10 years later it's the law. Afaik, Delta airlines already trying to use faceid. And once faceid is required to buy gas and groceries, your complete and nuanced dossier will be available for sale on all these data exchange brokerages. In this beautiful future, faceid is needed to unlock any car and it would play you ads for 3 mins while it's starting.