By the time that pedestrian has even traversed a single lane, the LIDAR on top has generated gigabytes of point cloud data showing her moving, assuming constant

By the time that pedestrian has even traversed a single lane, the LIDAR on top has generated gigabytes of point cloud data showing her moving, assuming constant velocity of both car and ped, on a straightforward collision path. I don't see how from a single forward-looking camera you want to deduce this crash was "physically impossible". That isn't even half of what we expect from human drivers. We expect them to swivel their head.