I’m not so sure people wouldn’t or don’t sacrifice themselves when faced with the ethical choice. I use pilots again as an example. There are many stories of the pilot desperately staying with the ship to avoid a populated area during a crash.
Still the purpose of a car or driving is not to be safe, so I’m not sure of the fixation of safety on robotic cars. After all if you want to be safe, stay home. Personally I’m more interested in who is making money off of them and who stands to gain in the future?