This day and age, it’s not a big deal, and it is quite a useful feature on my newer car. I wish my Expedition had one! Wife has backed into many things...
It can cause accidents also.
I hate the things. The field of vision is limited so people are not turning around to see where they are going and drift into potential trouble spots.
Yet they won’t mandate automatic headlights. Barely a day goes by where I see a car driving long after dark with nothing but daytime running lights in the front - or no lights on at all.
You are wrong. It is a big deal.
Why should some nincompoop sitting in Washington DC have a say, at the point of a gun, over what we decide to have as a accessories on our vehicles?