You could easily write an wrapper to translate touchid calls into ssh and back again. Even further translate a ~ possible match into a range sequence (think close but incomplete painting) - no magic there. I used the camera for that before when touchid seemed like a tricorder feature from star trek :-)
Try making such App yourself, a good motivation to learn Swift! Apple has good doc's around all of their SDK's so after initial pain of Xcode you can do it in few days.
Seems like a good idea to use the feat. even when everybody will tell you of gazillions possible security risks that are, well, possible (like a lot of other things). You will need a dev account though (99$/year...), since self-signed apps cant access all macOS SDKs functionalities, touchID is (possibly) not accessible without signing.