I think the point there is, morality doesn't come from nowhere. i.e., there is no objective morality. Universe doesn't make right or wrong rules etc etc. But that answer is not very helpful
Morality mostly comes from evolution, and we've post-hoc rationalized it with our nice big monkey brains. Humans got an evolutionary advantage by working together, but other animals not so much. Male ducks are so rapey that the females evolved hidden passages in their vaginas. I don't think any sort of duck society would see eye to eye with humans on the issue.