There is a radical view that consciousness is the fundemental unit of reality, and as such, it would not be wasted.
Then there is a particular kind of emotional attitude / posture / intent, where the something is treated as if it were sentient. It is neither cognitive or affective empathy, ao much as a shift in how things are experienced. It isn't something invoked through will. Hard to describe if you've never experienced altered consciousness states.
That particular shift is a fairly important experience for people (or at least for neurotypical), but is not obvious why to anyone who had never experience that shift. (I am speaking about neurotypical people, and some neurodovergent people, not necessarily someonr with a pauci-affective empathy neural architecture, such as people who are psychopaths).
Because courtesy requires some amount of empathy and mental effort on top of what's required just to communicate your point. That effort is wasted on a machine.