Except that not everyone has a license plate but everyone has a face. So its a much bigger intrusion.
Two can play at the "I don't care about your problems because they don't affect me" game.
Some people live in rural areas with little to no government infrastructure that can be used for dragnet surveillance. They don't have to care about the government tracking faces with the subway security cameras.
That's a dumb game to play. Dragnet surveillance is bad in all forms.