The humans and aliens have (at least slightly) different concepts for the things they’re valuing, each being informed by and partly based on their own direct experiences, which differ. So they can disagree on the basis of caring about different things and having different views.
This is like one being hedonistic utilitarian and the other being preference utilitarian. They’re placing value on different concepts. It’s not problematic for them to disagree.
The humans and aliens have (at least slightly) different concepts for the things they’re valuing, each being informed by and partly based on their own direct experiences, which differ. So they can disagree on the basis of caring about different things and having different views.
This is like one being hedonistic utilitarian and the other being preference utilitarian. They’re placing value on different concepts. It’s not problematic for them to disagree.