If there were no meaning outside of humans, then every human would be free to construct their own meaning. This then leads to radical individualism, since no frame of meaning would be truer than any other.
That's what we do. How would letting others construct a meaning for us be better? The reason societies exist is because we lean to a human-centric meaning, not radical individualism necessarily, because we are hard wired to do so. But having a meaning imposed on you is not good, I think. Also, the reason we do good to society is because it satisfies us INDIVIDUALLY, not because we think it is efficient - there was no thinking involved in us being social beings, but evolution.
(Supposing they can understand us.)
For them, we are radical individualists with no regards for nothing but ourselves.