You can. Just not in a car, because cars have license plates so not only can police identify you, anyone who can lookup a plate can. It’s non-anonymous almost by definition.
Where I live the registry is public so if I want I can ask for the owner of a license plate from the relevant authority.
And right now it’s true you can mostly walk or bike around in public without being tracked, but that’s just until we get the facial recognition really going. Then the argument will be that you were always showing your face in public and it was always possible that someone would recognize you so this is no different. But of course it will be different.
And now it’s possible, if you have a conversation in a cafe, that someone will overhear you. But if every conversation were being recorded, transcribed, and transmitted to the authorities, that wouldn’t be the same thing at all.