Behaving illegally and causing someone's death as a consequence should be treated as a criminal matter. It's a homicide, compounded by "reckless disregard."

there’s really no technical solution (except maybe self-driving)

A lower threshold for taking dangerous drivers off the road would help. And don't believe the self-driving hype: self-driving car makers' stats should not be trusted unless corroborated by peer-reviewed, third-party science, where the people doing the analysis have no conflict of interest.