I agree with OnTheBayou. It's quite possible that Grok simply preferred muscle meat (just as we do) and left the rest if not required.
Stefansson lived with the Eskimo for many years, including at least one tribe that had never before met a 'white man':
Stefansson also rejected the second proviso (more than he did the first one) that they ate the entire animal. Both Eskimo and northern forest Indians, and whites who live with them have a clear mental picture of the animal they butcher. They divide the carcass then or later so that certain parts go uniformly to the dog team, the rest to the family. These divisions of the carcass vary from one animal to another but do not vary within the species unless slightly by season. The liver is nearly always given to the dogs as are the sweetbreads and all things in the body cavity except the heart and kidneys. The kidneys were given to the children somewhat as if they were candy. The only time the forest Indians and the Inuit of northern Alaska and northwestern Canada ate the whole animal was only under the conditions of famine. When they ceased to give the dogs the parts that they normally got, it was also time to kill the dogs themselves and eat them too.
Doesn't seem to be any merit to the myth that Eskimos ate the entire animal. Like us, they preferred muscle meat.
I'm sure you can eat organs (and you should probably eat them when you feel like it), but I'm not so sure they are 'vital' on a carnivorous diet.
I'm much more inclined to believe that it is a CW myth that you 'need to eat the whole animal', used to deter people from going carnivorous (by trying to scare them).
The "Seven Deadly Sins"
• Grains (wheat/rice/oats etc) . . . . . • Dairy (milk/yogurt/butter/cheese etc) . . . . .• Nightshades (peppers/tomato/eggplant etc)
• Tubers (potato/arrowroot etc) . . . • Modernly palatable (cashews/olives etc) . . . • Refined foods (salt/sugars etc )
• Legumes (soy/beans/peas etc)