That’s really not how food calories are defined. https://en.m.wikipedia.org/wiki/Atwater_system

Now, a lot of simplification goes on and it’s true food labels are based on heathy digestion. But, that has little to do with the actual definition.

PS: I think this goes back to how the description of how Calorimeter’s are used. Yes, they give a value from burning food, but that’s not the only number being considered.