In this case, I concur that your argument may be true if you include animals in your utility calculations.
While I do have reservations against causing suffering in humans, I don't explicitly include animals in my utility calculations, and while I don't support causing suffering for the sake of suffering, I don't have any ethical qualms against products made with animal fur, animal testing or factory farming, so that in regards to pigs, cows and chickens, I am an utility monster.
Haven't had one of these for awhile. This thread is for questions or comments that you've felt silly about not knowing/understanding. Let's try to exchange info that seems obvious, knowing that due to the illusion of transparency it really isn't so obvious!