[Scion9066]

Generally, you're not logging in directly with the biometric data. The biometric data never leaves your device, it is just used to protect some kind of secret key on the local device that it actually uses for the authentication when logging in. If you need to log in another device, you would use an existing device to confirm the new login or you would need to use some other authentication method.

[pclmulqdq]

Well, I got fingerprinted by FINRA when I took a job at a trading company, and I have been fingerprinted by the US government multiple times. When I went through China once, they needed a fingerprint or two. Same for my Brazilian visa.

Biometric information leaks through other means, and if you rely on it for security, you are letting a lot of people in.