Are the words of this comment subjective3 (if we drop the specifier "moral" for a moment, given that this idea is not defined in this context)? They are determined by my reasoning, but they also obey the laws of physics. The notion of "independent" is not easy to make precise.

I had similar thoughts when reading that passage.

There is (also) a certain sense in which the concept 'objectively subjective' is relevant here.