I get your point, but on the other hand if a pedestrian was crossing on their when the light turns green and the pedestrian was already clear of the lane, I think most human drivers would also proceed. I'm in a different country but, both as a driver and as a pedestrian, I witness this exact situation on a daily basis.
I'm not trying to detract from the horrible outcome of this case, but the problem wasn't the car pulling away at a green light when there were no obstacles in front of it, but the way the car decided to move itself to a "safer place" immediately after an accident when it clearly didn't have enough sensors or the AI wasn't trained sufficiently on this kind of situation to be 100% sure that it was safe for it to make the maneuver.