Re: cows/goats milk not being "meant" for humans. Animals are "meant" to consume whatever they can successfully digest and derive nutrition from, usually by evolutionary processes. You might reasonably argue that an anteater was "meant" to eat ants because it has become adapted to do so through evolution.
If you are saying that humans are not "meant" to eat dairy because the cow/goat didn't intend you to, then you presumably don't eat anything apart from fruit. Seeds (grains, beans etc) were "meant" to grow into new plants. Root veg was "meant" to store nutrients to help the plant grow next year, leaf veg was "meant" to provide the plant nutrients through photosynthesis.
If you are not lactose intolerant then you are specifically evolutionarily adapted to digest lactose, indeed, it's one of the most recent examples of human evolution.
https://www.sciencedirect.com/science/article/pii/B9780128117200000015