Organic material is organic material.
Calling it food waste for one instance and not for another is improper, and confusing. There are economic reasons to use every bit of food that has a value to it. As is said, everybit of a cow is used except the "moo". Directing the emphasis to the home that the article speaks of, and the (US) 38 million tonnes per year of waste, and trying to win people over to do their part so they can feel good about themselves is indecent.
Somewhere in those numbers, there is a whole bunch of accounting problems with what is food waste and when it becomes such.
I suspect some double tallying, and keen omissions, and additions.
One cannot just eat the shell of an egg, ( or then again maybe some people do ).
Plate scraps include bones, shells and any other unedible parts of a meal, including the sauce left on the plate, which kids like to "lick their plates clean".
After a meal at home that becomes food waste.
At the processor for a ready made meal it becomes a food loss, but re-directed into another chain for the food supply, either fertilizer or animal food.
If I feed my dog a steak, is that food waste, since it has now been directed from human consumption to animal consumption.
Since the decision was may at the home rather than earlier in the chain at the food processor - that changes the tally?
I buy a corn cob.
1. I shuck it, cook it, eat the kernels, then the thrown away husk and the left over cob is NOT food waste, since those parts are not edible for human consumption.
2. I throw the whole cob and husk away then ALL - the kernals, the hush, the cob IS food waste, since there was a meal there, albeit, just the kernals.
The definition is problematic.
Others have said so.
From Wiki.
https://en.wikipedia.org/wiki/Food_waste
Bold is mine.