While this might be true for the truly general case (though I’d bet it’s not), when you have a very constrained operating area it’s a lot less true. Waymo in P

While this might be true for the truly general case (though I’d bet it’s not), when you have a very constrained operating area it’s a lot less true. Waymo in Phoenix and current cruise cars in SF seem like good counter examples. The bar is also a lot lower - human drivers are pretty bad.