I think you are right. Rented a new vehicle recently on a trip and it had blind spot detectors - it would tell you when a vehicle was in one of the traditional blind spots. I thought this was great, easy to understand and thus trust.
When you come to trust these systems, you cease to verify if they're working properly. Unfortunately, the system will eventually fail, you'll have a false negative, and you will have been since trained into not looking into your blind spot the tradition way because 'the machine did it for you.'
You will potentially cause an accident. Same thing with lane assist, same thing with adaptive cruise control. Perhaps not you, specifically, but some less vigilant driver.
http://pages.cs.wisc.edu/~gdguo/driving/BlindSpot.htm
People don't like to do this because then they can't see the side of their own car in the mirror.
Perhaps that should be added to driving tests. You shouldn't get a license if you don't know how to make the car safe to drive in.
Am I wrong in stating it's because people want to see the side of their car? It was for me when I first started driving and for everyone else I've asked.
Is it because of my belief that people should only be licensed to drive if they can do so safely?
If I'm wrong, please give me the opportunity to learn what you believe is right. I'm open to improving myself, and recognize that I am not, nor ever will be 100% right in everything.
Many people might reasonably believe that the traditional alignment we were taught, with the look-over-the-shoulder to check the blind spot that we were also traditionally taught, is safe. It comes across as aggressive when you suggest no-one should be allowed a license without converting to your new method.