Earlier quoted context omitted.
That a human was still in the loop in addition to a computer and both missed it.
But that's not what happened. They saw it, called it out, and very deliberately let the car (not) deal with it because that was the point of what they were doing. They did not "miss" anything.
But it doesn’t help disprove that it’s entirely the computers fault. They could have taken action if they were a rational driver.
From my perspective I think many people would have failed to take action. Swerving or hard breaking at those speeds is very dangerous. And many things on the road like roadkill or bags can be driver over