The comparison isn't between milk and not-milk. As I mentioned previously, you can eat dairy without lactase persistence. Secondly, lactation is a pretty diffe

The comparison isn't between milk and not-milk. As I mentioned previously, you can eat dairy without lactase persistence. Secondly, lactation is a pretty different energy calculus from eggs. The calories in it can be used to grow the baby animal it's intended for. That would still be less efficient than direct consumption, but probably not as substantially with ancient animals.