I don’t think this a great comparison. Firstly, sheets of glass are not a common road obstruction, and even if they were cars have the added advantage of more sensor types (doesn’t require much more brain, it’s equivalent to just another ‘colour’); Secondly, I’ve also been hit by a car driven by a human.

The driver had stopped at a give-way (major-minor junction) [0], then failed to look in my direction and pulled out into me as I was turning into that road.

[0] right where this unrelated white van is in this Google street view photo: https://goo.gl/maps/Xe87aruFbbUazXhp7