I don't know about that. It seems all ethical theories make some things intrinsically valuable so its a fundelmental part of ethics.
I think the debate is still open as to whether there are values beyond human subjective thinking. Nature seems to hold value in itself. We may come to appreciate or recognise that value. But to do that we must have the ability to value things and value them in degrees. So is this a case of part humans doing the valuing in their subjective way and part recognition of something of value outside humans innate in nature for example.
If we look at nature and see water sustaining life, creatures with mechanism that allow them do all sorts of incredible things and ecosystems that work better than anything humans can make we would have to see some value in that in itself and not because some persons subjective view (which may be wrong) thinks its valuable. Logic tells us there more value in it than just what we think.