Legally, the driver may not have been at fault. Even so, I was taught as a child learning to drive that when I see a person in the median, watch them. They may walk out in front of you. They might even fall into the road.
So, be prepared maybe even by changing lanes before that point in order to get out of harm's way. Apparently, this driver wasn't watching, choosing to let the car drive itself.
There are plenty of benefits, but you can also ask the dead person in AZ about the downside of defending a product that isn't ready. A self-driving car that drives itself without the most basic of defensive driving habits simply isn't ready. Ask yourself, why do the reports show that brakes weren't applied?
So, be prepared maybe even by changing lanes before that point in order to get out of harm's way. Apparently, this driver wasn't watching, choosing to let the car drive itself.