is it possible the fine grind those ready-to-eat foods are made from is done to make it easier to digest?
that would sort of jibe with what BBM said above
You don't want to waste energy digesting a ham sandwich when you could be using it (energy, not the sandwich) on the brutal climb in front of you.
I added the parentheses.
I generally shy away from those technologically advanced prepared foods but honestly if its tasty and can keep me going maybe I should try it.