Years ago I fished with some folks that had a place on Harstens Island in MI on the St Clair River. They always had a chest freezer full of walleye. They didn't waste anything. You would think and most people who manage to harvest big numbers of anything that they would take the prime parts and discard the rest. But that was not the case. I have seen guys kill limits of pheasant, ducks and doves and just keep the breasts as an example. I think its more cutting corners than intentional arrogance. Maybe its ignorance that they don't know how to prepare certain parts IDK. I digress...yes walleye livers are edible.
Same with geese and turkey. Most just breast em out. And I'm ok with that. I choose to part em up and put the parts in the crock pot. Make soup or stew or pot pie in the end. Use the breast separately. Now and then I will deep fry a turkey. I still think that's the best way to cook turkey, cept I love dressing. Stuffing is ok but dressing rocks!