I am able to negotiate widths and had a car without a single sensors for 15 years, but that doesn't mean I won't get help from sensors. Kids running around suddenly somehwere I'm not watching.
If you don't need any electronic assistance, that's fine, but that doesn't mean we're all as good as you. It's not so much to avoid running into other cars and buildings as it is avoiding people, animals or something else moving. If anything, I'm happy that people in other cars get more sensors since I have no control over what they are doing in the car. If having the sensors prevents a single accident during the car's lifetime, it's worth all the beeping. I trust the sensors more than every driver out there, even if they have a perfect track record.
Every year, cars get more electronics to make the roads safer, and I believe that to be a good thing, even if we have to listen to some beeping. I don't think the manufacturers and regulators add more safety systems for fun.
Park Assist is another story, and if people want such a feature, that's not a problem for you is it?