I agree, and I wish there was an option to always require both a passcode/password AND biometrics in iOS and MacOS. While it would become a hassle having to do it every time, it would at least guarantee that one could retain their 5th Amendment rights if the device were seized.
Having no backup to biometrics could lock you out permanently if it stops recognising you for some reason, so it would need to accept just the password, and at that point you can just turn biometrics off entirely
