I think he's getting at the why. Do you respect your machines because by doing so you're ensuring that they will continue to operate for your benefit in the future, or are you doing it because you care about their position and stature in "life"?
Assuming you respect other people's property, you don't do it because of the property itself, but because it has value to another human being-- a human being you at some level have respect for.
I think the point is you treat "machines" and humans differently (and you'd be insane not to), and if you were fine with being treated as a machine, you'd be saying you're fine with being treated as a lesser. Personally, I think that's a weird place to take the discussion and ultimately is irrelevant.
"Meat Machine," at least to me, has a negative connotation. As I believe being "human" is something intrinsically valuable, removing that from the equation will of course devalue it.