Since most grain has an animal feed value, making it less nutritious doesn't seem profitable. Not a master baker but I do believe poor value grain doesn't bake as well. I do know at the farmer's point of sale grain quality affects the money paid for the crop. Poor grain is suitable only as animal feed and not given top dollar by the elevator or the feedlot.
I'd look at the food processors for any sign of making what we eat 'filler'.