My point wasn't about the blinker (i.e. turn signal on the outside of the car) being bad. The point was the annoying beep, which will not make me use the blinker any more or less. It was also just an example. There are other beeps that are simply just annoying and not helpful, while the car in question is actually missing other very useful information (that I have had in other cars before). Basically some cars systems have better UX/UI than others. The worse ones are annoying and distracting. The better ones present you the necessary information you need.
I have actually been in situations where swerving around an obstacle that appeared suddenly was the best option more than once. If I had hit the brakes, someone could have been seriously hurt (not just talking about making metal and plastic trash out of a car) - sometimes that someone being me, by being squished by something much larger, heavier and better built than my car's tiny crumple zone. Think huge - probably full of heavy stuff too - truck trailer coming at me with its broad side. If I had hit the brakes instead of speeding around it, I would not be writing this.
In such a situation you do not have time to think about a button you have to press to disable some "please adhere to the speed limit" software. You ideally want to be in an automatic transmission car where you can just floor the pedal and it makes a jump, unless you're a able to shift down quickly like a race car driver and floor it. I guess my point is that these system really do need to take into account the worst case you can imagine and make that worst case safe.