And to some extent, I also drive with my ears, not only with 2 eyes. I often can ear a car driving on the blind spot. Not saying that I do need to ear in order to drive, but the extra sensor is welcome when it can helps.
There is an argument for sure, about how many sensors is enough / too much. And maybe 8 cameras around the car is enough to surpass human driving ability.
I guess it depends on how far/secure we want the self-driving to be. If only we had a comprehensive driving test that all (humans and robots) could take and be ranked... each country lawmakers could set the bar based on the test.
The other day I slammed the brakes at a green light, because I could hear sirens approaching -- even though the buildings on the corner prevented any view of the approaching fire trucks or their flashing lights. Do Teslas not have this ability?
I don‘t know whether Tesla‘s self-driving mode could do that.
However, notice that deaf people are allowed to drive, ie. you are not expected to be able to have full hearing to be allowed on the road.
Nuanced point: Even if vision alone were sufficient to drive, adding sensors to the cars today could speed up development. Tesla‘s world model could be improved, speeding up development of the vision only model that is truly autonomous.