I agree 100%, this post is not a full rebuttal and does not tackle the concerns directly:

• The character of the organisations in FIDO does not inspire confidence against lock-in or monopolistic behaviour
• The possibility of future attestation cutting out those on 'unapproved' software and hardware.

I agree parts of the tech are good, particularly the anti-phishing, anti-replay measures.

This post seems to say passkeys are in good hands so nothing can go wrong, but I don't think that's enough.