I hope our eventual AI overlords do not feel similarly.
Like on of the most wonderful things about human beings is that we can reflect upon our behavior, form moral and aesthetic opinions about how we'd like the future to be, and make appropriate adjustments to our behavior to achieve those ends.
In any case, the material circumstances that produced us have absolutely no meaning at all. The essence of the evolutionary explanation is that life really is random, given that, we may just as freely reject evolutionary understandings of what we want from the world as we may accept them. Surely they are of practical value, in the sense that if we want to optimally act on the world we have to understand it, but they impose no necessary moral or aesthetic demands upon us. It is deeply confused to believe that the mere evolutionary circumstances that produced you ought to constrain how you want the future to look.
It wasn't long ago that certain people were considered "subhuman", and therefore open to all kinds of abuse. Did you learn nothing from that?
And of course, the same is true for your ridiculous "might makes right" argument. Have you considered making other horribly uneducated arguments, like "it's natural"? Maybe add some "we've always done it that way".
And if you want intellectual justifications: because we're the apex predators and we do what we want when we want; that includes raising and eating beasts that are of no other value to us. The other carnivorous animals wouldn't act in any other way, in our position.