Skipping past the implication that the author believes that the only things that matter are the things he personally cares about, he doesn't seem to realise tha

Skipping past the implication that the author believes that the only things that matter are the things he personally cares about, he doesn't seem to realise that we use the word "subjective" to mean two different things. We use it to mean _not objective_, and we use it to mean _internal_. In "subjective experience" we use the internal meaning of the word. Subjective experience is a fact, it is indeed the only fact that we each can know for 100% certain, all other facts are inference and induction and guesswork, but you cannot deny that you have subjective experience. It is _objectively true_ that I have subjective experience. The author wants to contend that it is _subjectively_ true that I have subjective experience. To take an example, I don't know whether my cat has subjective experience, and I think it is impossible to know for certain. Nevertheless, there is a fact of the matter, it is either true or false, it is not a matter of my care for the animal, it is not in the eye of the beholder, it is an innate property that a system might or might not have.