Until a proposed system to make automated vehicles feasible on public roads in mass is proposed, developed, protocols and legal procedures released related to this come about, this is nothing but a scare topic making vague assumptions about things that aren't even a topic for development yet.
Not really. We already have self-driving cars, and we have a lot of data about traffic accidents and mortality. The cars aren't available at retail yet, but they exist. Teaching them to drive in a way that makes the right safety tradeoffs is appropriate. (E.g. driving slowly through a stoplight might cause more accidents and fewer deaths; that's a hunch, but we have lots of data so there's a moral calculation that should be made based on the data and desired outcomes.)