I have literally never heard a complaint about reversing cameras in my life
The idea is that the cameras require a large display on the dashboard. If you could sell a car without them, we might have a cheaper class of small street-legal vehicles with simpler controls.
Sadly, with electric vehicles being thousands of kg heavier than ICE vehicles, kei-style cars would probably get a lot of people killed if they were introduced to the US today.
Like with backup cameras that we just don't want to pay for. I've been driving for 20+ years and never once bumped my car. So the safety aspect isn't really relevant. But when I get told "We added this backup camera for free, so you're saving 500$". Honestly I'd rather have you shave 500$ off the price of the car.
I've actually had that conversation about bluetooth in my current car. 8 years old and I've never used the bluetooth. It was tech for tech sake. It adds no value.
I've seen many people complaining about modern safety features such as back up cameras and collision detection, I wouldn't call that bad technology.