Don’t proper biometrics also lock you to a device? My phone isn’t sending my fingerprint anywhere, it’s comparing data against its baseline and then attesting that. If you did it any other way, then any data leak means you’re exposed literally forever.

Passkeys are just more convenient replacements to passwords, ideally suited for a password manager flow.

For most people, this works really well and is a lot better than remembering loads of passwords. It's easier to get people to remember a single stronger password and use passkeys to login to services.

The whole lose access thing isnt as big of a deal breaker as you make it sound (It literally works the same as it does now with passwords). Considering the large amount of people that forget their passwords and constantly reset them, passkeys can help. There's a reason popular sites just ask you for a code from an email now instead of even prompting for your password.

You want to use biometrics to individually login to services, great. But what about those of us who don't want to rely on biometrics? That's where passkeys do both jobs.

How the fuck have you never heard of fingerprint copying?

Every fingerprint scanner which attempts to apply liveness detection has been fooled.

No biometrics is secure when used remotely. Ever. You can literally just replay the biometric data people send you after you create a phishing site and hack their accounts if it was sent raw.

https://peoplesphone.co.uk/news/hacker-fakes-german-minister-s-fingerprints-using-photos-of-her-hands/

That was a long time ago and things are better now but it's just an example.