You've had backup cameras often fail? You must be very unlucky. After many years of driving and riding in cars with backup cameras, I have never seen one not work, let alone "often" not work.
Where is the ubiquitously proven support for the assertion that backup cameras don't increase safety?
Deliberately re-framing an argument to force me to accept a conclusion, while misinterpreting what I said is disingenuous.
I've read several of your replies towards me and I can tell that you either unable or unwilling see my point of view. So there is no point in having a discussion with you.
If you want to use "often don't work properly" as an argument, then people are allowed to challenge that argument.
I guess they shouldn't have assumed you were speaking from experience, but I don't think that's a big deal. That's not forcing you to accept any conclusion. If it happens "often" you should have examples and/or data. If you don't then maybe you should reconsider if it actually is "often".
And they directly asked for data that it doesn't increase safety.
That's not unwillingness to see your point of view. If you provide quality evidence, you can win them over.
Where is the ubiquitously proven support for the assertion that backup cameras don't increase safety?