Nothing of this explains anything, at best it increases the confusion. If anything, all this mumbo jumbo pushes me further away from using passkeys than before.
- you can't get phished
- you dont need to worry if your password is securely stored
- Devices support a flow where a QR Code kicks off a Bluetooth LE handshake between two devices to sign a one time Passkey challenge. That can be used for one time login on devices you don't sync your Password Manager to or to help bootstrap additional Passkeys on the new device.