As you say, it’s nice if there is an additional assistant, also for e.g. health emergencies.

That said: Driving assistants should only ever be that: assistants. They are not a replacement for safe and controlled driving. I know I’ve been an arsehole on some occasions when I had my driver’s license fresh, and I got lucky that I didn’t have any accidents until I learned to calm down and drive with respect for other people and animals. Just throwing that in here to say I don’t consider myself a saint. But anything “self driving” should be forbidden everywhere, unless it’s on rails that the vehicle can not reasonably escape even if it wanted to (i.e. trains).

Exactly, my previous car (BMW) once saved me in the fog by emergency braking for something I wasn’t able to see yet.

If you were driving at a speed at which the low visibility would have gotten you into into an accident due to some obstable you weren’t able to see yet, you were driving too fast. Simple, isn’t it?