It's because we don't think rocks can suffer. And if we're more concerned about our fellow primates than we are about insects, as indeed we are, it's because we think they're exposed to a greater range of potential happiness and suffering.
思っているからです 昆虫よりも 霊長類が大事だと思う理由は 霊長類が経験するであろう― 幸せや痛みのほうが大きいと思うからです