I agree that the UX could be better but it's definitely seeing you better than a human would. It can see you behind shit and around corners and in blind spots. Whether it reacts correctly is another story, but additionally, there's a strong incentive for Waymo not to hit you because of the regulatory regime. They have to report all collisions to a regulatory body and they have to send in all the data they had showing why they hit you. If they're at fault, you're almost certainly getting a big payout.