A frozen food is made of real food, the process all starts from scratch with "natural" ingredients (well ingredients).
The frozen food vs fresh cooked food is more like a film vs live acting. Or listening on tape vs a live concert. Even this analogy is lacking, a frozen food is made fresh at some point, it is about mass production not origin and ownership.
The frozen food is not food from your kitchen (or trashcan) remixed and added onto other people's plate.