Because the meat that most HUMANS eat and the meat that wild lions eat are very different.Most people only eat tendons, muscles, ligaments and fat - the tastiest parts of an animal carcass. Plus the meat is drained of blood and cooked, so that we don’t get all the nutrients in the blood and a lot of nutrients in the meat is destroyed by the cooking process. Processing meat ALSO destroys a lot of nutrients as well. So humans definitely cannot survive long by eating only supermarket meat.But carnivores like lions eat everything and they eat them raw. They eat the intestines, the anus, the genitals, the stomach, the GULL bladder, the lungs, the stomach, the liver, the kidneys, the heart, the brain, the eyes, the NOSE, the bone marrow, the tongue, etc. They also eat a lot of the animals’ blood. They do this raw, so that every precious nutrients that was keeping the animal alive is now transferred to the lion.So lions don’t need to eat any VEGETATION, because they have a full balanced diet from their preys.Explanation:Hope itz help u