Incorrect. It is safer to have the mirrors cover a wider range. Just adjust your mirrors correctly to not triple what they show.

Pointing all mirrors back produces the blind spot we have been discussing this whole time and makes it more unsafe because things can be in that blind spot. A pedestrian behind your car would be seen by the rear view mirror.

The arrangement you are advocating for is incorrect and should never be used due to it solely limiting view and increasing danger.

Listen to the engineers.

They are sideview mirrors. Most people do not have them where they should be and instead have three mirrors pointing to the rear, showing basically the same thing. Why turn your head away from the front when a quick look to the mirror is safer?