I don’t agree with your argument.

Making a human go to prison for wiping out a family of 4 isn’t going to bring back the family of 4. So you’re just using deterrence to hopefully make drivers more cautious.

Yet, year after year… humans cause more deaths by negligence than tools can cause by failing.

The question is definitely “How much safer are they compared to human drivers”

It’s also much easier to prove that the system has those issues fixed compared to training a human hoping that their critical faculties are intact. Rigorous Software testing and mechanical testing are within legislative reach and can be made strict requirements.