I mean, I would agree that it's not a particularly useful thing for consumer-phone-bank usecases, but that doesn't mean the feature is bad (or harmful).

Just to be clear, no one is saying

> banks have to use it to be compliant

nor are they saying

> it only works on our platforms

As far as I know, if systems were to use attestation it would be in a lot of senses more open than what attestation is available today (in the sense that more devices could use it). But also I don't think anyone who works on passkeys is saying banks need to support FIDO attestation to be "compliant".