To be fair, the delivery robots I've seen (made by Yandex, which is known for bleeding-edge developments in self-driving technology) made good job to be as unobtrusive and predictable as possible, while also avoiding humans in quite a large range.
My only issue with them is that these are camera-equipped devices rolling the streets and likely sending all that footage to their Big Tech daddies. Besides that, they do their job well, reducing the need for hard human labor.