One has to wonder what such an AI's opinion would be on humans that aren't pets.

Probably the same as ours are on stray cats: "mildly annoying when they're in heat, and might carry viruses you don't want to catch. But they're too cute to exterminate and too useless to exploit, so we just adore them from a distance".

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That said, there would probably be lots of "crazy cat lady" robots who go around "adopting" every stray human they see and luring them into cramped, unsanitary shelters.