Re: I'm not sure I understand
I am inferring he is implying that while courts may excuse a driver trying to save their own life by making a snap decision that kills others, higher standards can be applied to software engineers and lawyers making considered decisions in a comfortable office.
I predict that self-driving cars will prioritise the safety of their occupants - they are the ones explicitly or implicitly volunteering to trust their safety to the vehicle, so would probably deserve a higher standard of care. Pedestrians already accept that they run a (small) risk of dying because of drunk/crazy/unconscious drivers.
There will of course be many incidents that enrich the lawyers - probably a price worth paying for the overall reduction in road deaths.