​Why don’t they invent human kibble?

Dogs, cats, and other animals have kibble designed to meet their nutritional needs and it seems to work for them. Why don’t they just invent human kibble too? It could take all the guesswork and failure trying to cook healthy and diet. Different kibbles could accommodate different lifestyles, like high protein for athletes, baby chow for babies, low calorie for sedentary people, and senior 65+ for older people. It’s also not prone to spoilage, making meal prep for, say, long camping trips or soldiers during a war nonexistent. All and all, it seems like it could work if someone did it, especially if they were all pizza flavored.