Which is where the utility of backup cameras comes from. It's nearly impossible, at least impractical, to design a car that holds human beings with a rear view

Which is where the utility of backup cameras comes from. It's nearly impossible, at least impractical, to design a car that holds human beings with a rear view that could provide the same field of view as a camera. Even if the back of the car was a giant pane of glass just having a trunk or back seat will occult the driver's rear view such they could miss a curb, pet, or small child. Even a shitty camera will give a better view than most cars' actual rear view from the driver's seat. They're even more useful when you consider they better enable shorter or taller drivers that don't have the ideal view out the back of the car. I check blind spots I know my camera has but then use the camera to actually back up because it's got a far better view from the back of my car than I do from the front seat.