Downvotes don't change facts. The browbeating over people misusing antibiotics at the individual level is a lot like plastic producers guilting consumers over recycling when the root cause is from industry.

Factory farming uses antibiotics purely for profit, the health of the animals is only an ancillary benefit. Animals fed antibiotics grow larger, driving higher profits. It's a tragedy of the commons situation, since the abuse of antibiotics has major negative externalities for us all, but the profits are reserved for the owners of the factory farms.