According to the manufacturers, those forensic devices also don’t work on my iPhone unless it’s unlocked with a password, but this is also irrelevant because they can get the stored passwords from the same phone in any scenario where they can access the passkey.

More to the point, this is also not what the average computer user is worried about. It assumes that they’re targeted by police, have something they need to keep secret, and that those police can compel physical access but scrupulously obey civil rights protections.