How else is a manufacturer supposed to get feedback?
Writing to or calling the manufacturer may be effective for small companies, or companies with a good track record in ethics. Otherwise, let the sales do the talking.
This will only work out for you (and others) if there are other manufacturers that don't add features like this at all. And since you haven't provided feedback to anyone about what you don't like, other manufacturers won't hear about this either, and may also add these sorts of features.
I agree that one person providing feedback isn't going to do much. But that's why everyone needs to do so. It's like voting: your individual vote usually won't change anything, but the votes of everyone can. Refusing to provide feedback (or vote) because your individual action won't change anything on its own doesn't solve anything, and just gives those in charge less data to work with to figure out what people actually do want.
And then the VW software team managers say "Look how great Tesla's are selling. It's because they have more autodrive features. Give me more money to add more features." Note, that was "add features" not "improve features".
That is: their test results should be providing them with all the feedback they need. We're not talking about a broken UI on a shopping website. Broken "smarts" in a car is like broken brakes; it's not OK to just wait for users to find out for you.
If they "did the wrong thing" with car safety, then they shoun't be allowed to sell cars until the problem is fixed.
You can either stick your fingers in your ears and keep yelling "this can't happen!", or acknowledge that it does and try to do something about it.
"I categorize this software as 'safety' related, so it must be perfect on the first try and never need any improvements"
Existientialism is bad for your mental health, friend.
Making incorrect generalizations is bad for your health too.
I did not write that, thus they are not "contained in (my) comment."
I kept getting warnings of 'erratic' driving from my VW and I couldn't figure out what was going on. I finally figured it out. The car was seeing asphalt repair patches on the road, which are by their nature wiggly lines. It clearly figures the line is straight and the car is swerving all over the place.
It also wants to hit the brakes any time the car in front is braking and my foot is on the throttle. Ok, but this fails constantly in two situations. First is if the car in front is turning left and I'm moving around it on the right. Second is if I'm far enough back that I'm ok with light throttle even though the car in front is braking.
So, yes, I have less than full confidence that a drunk driving detection system won't fail. The question really becomes whether the net benefit outweighs the potential failures. With the VW applying the brakes, I accepted the annoyances the first time it saved me from plowing into the car in front of me when they unexpectedly hit the brakes on a highway on-ramp and I was watching the traffic on the highway instead of the car in front.