There was an incident not too long ago where one of these robo-taxis ran a woman over to avoid another car doing something it didn't expect and then it froze up and wouldn't move at all with the woman trapped under the car. There wasn't a driver to get out and help and it took a few minutes for bystanders to get involved to help her, and she ended up dying at the scene.

If we can't get rid of these monstrosities, at least having a human monitoring them that can call 911 is important, but that still doesn't solve the problem of there not being a human present to render aid if something goes wrong. (Not to imply that every human will be willing or able to render aid, but some chance of help is better than no chance of help.)