> Germany requires all citizens to have a biometric ID card

Partially true for your picture, that is restricted to the ID itself. And that is a relatively recent addition. You can still get an ID with "imperfect" biometric photo, which you provide yourself. Biometric photo is defined by some rudimentary rules (you are not allowed to use a picture of the back of your head) that isn't comparable to fingerprints in any way.

> I’d expect any social/political/legal bugs to have been solved by now.

heh, have you written a test?