I understand your argument Sir,
May I submit one more thing for your consideration; Catering Commissaries are a revenue producing department as well. The Airlines have within the last decade or so, embarked on alternate revenue capturing initiatives that have expanded well beyond the basic ticket fares. (I’m certain AA has done this as well)
In the In-flight arena, this was accomplished with what is known as BOB (Buy On Board) Programs. These programs offer passengers the ability to purchase amenities such as Snacks, Beverages, and even Duty Free items such as cosmetics, electronics, clothing, tobacco products, and jewelry.
My understanding is that these endeavors, when coupled with the baggage fees, are instrumental in the new business model.
For that reason, I would place Catering on equal level with Cargo, especially since domestic Air Cargo is limited by available storage space (Cargo bins) that are now full of revenue producing baggage. However, my understanding is that International Cargo is a workable revenue segment in terms of return for available cargo space...