Not defending anyone using Touch ID as a reason to complain about this -- I think it looks like a great keyboard -- but just yesterday I saw this super cool alternative to the hilarious "buy the world's most expensive mediocre membrane keyboard to tear out a tiny part" idea: https://www.youtube.com/watch?v=tB3lk-PNA6I

As near as I can understand it, macOS supports a smart card reader (and apparently will defer to its sign-off for authentication duties when it's present and configured, and Touch ID isn't), so if you emulate a smart card reader you can make your own fingerprint sensor and have it say "I'm a smart card" and sign challenges like a smart card does.

The creator is very up front that this isn't equivalently secure for preserving state secrets, as if you carefully tear this device apart you can just short the pins that the sensor part connects when it's happy with the fingerprint. On the other hand, it is hilarious that anyone who isn't a person of interest for the CIA, Mossad, MI6, or FSB would think they're important enough for someone to go to the trouble of using that method to unlock their secrets. Anyone else would just club you over the head or slip you a mickey, and stick your unconscious finger on your fingerprint sensor.