We're not aiming for "perfect", we're just trying to make some progress on the phishing problem.

The irony here is that many of the complaints in this thread seem to be complaining about how imperfect passkeys are. No-one disagrees that they're imperfect!

Yes, and passkeys generally help. But your concern upthread was that any mechanism that lets users share or export passkeys (or other authentication material, such as passwords) allows a user to be phished. Basically, the very fact that this is somehow accessible means a user can be tricked into disclosing it. This is correct, but my point is that perfection in that area necessarily means that a lot of things that are useful (some of which have been shared in sibling threads) are now impossible. So we should not actually aim for perfection on phishing, but just to make improvements where possible.