That is false. Safety engineering sometimes only mitigates risk, but often reduces it to practically zero, such that people have to be deliberately negligent to prevail in bringing about a safety incident. E.g. elevator holds 15 people, yet 45 somehow jam themselves in as a stunt.
Partial safety mitigation isn't so much how safety engineering works; it's how it ducks out of working due to non-engineering reasons. If any safety issue remains, that means engineering was not done in that regard: the safety engineers were excused from the requirement to design anything for that risk.
I had a flippant stupid reply. So they got a stupid flippant response.
Typically when you are reversing and there is likely to be something sat behind your vehicle (like a child or a pet). You are parked. You can you know look before you get in the car.
If you have parking sensors it will alert you to something walking behind you anyway.
The point being made is there are way to deal with this without the need for a rear camera.
> Typically when you are reversing and there is likely to be something sat behind your vehicle (like a child or a pet). You are parked. You can you know look before you get in the car.
Of course, ideally people see the child and do not hit it. When atypical incidents happen, we call them accidents, and when they start happening at rates we find unacceptable we often engineer solutions to make those accidents less likely.
This is why we have seat belts instead of telling people "you idiot you should have used the brakes!"