It's truly absurd, incredibly short-sighted even if one were to take the advantages at face value.
But the advantages are a microcosm of horror, too, like the ability to keep animals clamped in extremely constricted, filthy, stress inducing environments without the flesh literally rotting off their bones, while feeding them a diet (corn for cattle?!) which gives them ulcers.
The industrial farming practices are so disgusting I'm just lacking the words. Antibiotics should be a last resort, prescribed by a vet on a per-animal basis after other conditions are verified to be fine. There should be a clear financial incentive to keep farm animals healthy by default!