Re: "beyond the bounds of the reasonably predictable"
I'm not sure the Uber car could have avoided it. From what I've read the Uber was in one of the three lanes heading south, my guess is the far right lane and with that I will continue to present one possible scenario.
The person turning left which hit the Uber may have had their view partially blocked by another car, possibly the Ford SUV in the photo, in a lane adjacent to the Uber car and was trying to get across quickly perhaps because the gap in traffic was small. Once that car has gunned it to sprint through the left turn the Uber car gets t-boned toward the back end which sets it spinning, impacting the curb on the far side of the intersection sideways which tips it on it's side and it continues to rotate until it comes to a stop against the Ford SUV.
In such an event, the Uber car would also likely be blinded by the adjacent vehicle, assuming it was tall like the Ford, and unable to detect the impending impact until there was little if any time for it to calculate and react. Of course that's just one possibility.