Speaking of subs, why do so many eat from places like Subway and Jersey Mike's when they use processed meats instead of whole muscle meats? Arby's is another example of a restaurant that doesn't use whole muscle meats.
In a former career I had the opportunity to tour many types of food manufacturing plants, and I've seen first hand what goes into lunch meats, and other processed foods - boneless hams (who's ever seen a pig with a boneless back leg?, breaded fish parts, breaded chicken nuggets, and so on. I learned early on that if it wasn't cut off of the _________ (chicken, pig, steer, fish, etc...) in the same manner it's being served, don't eat it.
This is what those places use for meat instead of the whole muscle from the animal in question:
"2)
Moderately Processed – These are pieces of excess meat that are removed from the bone and ground together. Once ground, they are emulsified into a soft cake-like batter where flavors, additives, and binders are added so that they can form a mold. Once the consistency is reached, the meat is then cased in a cylindrical package or placed in its mold to be moved to the smoke house. It is here where the meat is cooked for several hours. Once completed, it is either packaged as one piece or sliced and then packaged. Examples of these meats are turkey, chicken, bologna."
https://www.builtlean.com/2012/04/03/deli-meat/