If you look to less developed cultures, they often eat the fatty parts of the animal - meaning the organs - over the meat. For them the meat is for feeding the animals.
A lot of wild game has very little fat and calories in the meat it’s self. You can gorge on rabbit meat protein and still starve to death from lack of calories. The organ meats are where all the fat and calories are. So what you share here makes sense.
The French and Chinese are less developed?