Being spied on is always a safety feature. That's why North Korea is the safest country in the world. No one ever dies there. Not a single case of covid!
Believe it or not, trying to tell people they don't want someone else just a voice command or push button away in the case of an accident, is actually a hard sell. It might be seen as a privacy invasion to some (whether it's used as such in practice is another story), but to others it might actually save their life.