Cutie isn't exactly wrong about robots being superior. As he lays out in "Reason," robots are stronger, immune to radiation that would hurt people, and don't need to sleep. In terms of raw power, robots have more than humans. And yet, raw power isn't everything (as we saw earlier with the Westons). Even if humans are inferior, Cutie still feels some affection for them. So when they get in the way, he doesn't crush them, even though he could. How nice of him.