Huh? No. As I understand it, GP is making the point that implicit in Sivers' idea is that there actually is, at bottom, a notion of objective truth that is more than merely this sort of utilitarian notion of useful. Because in order to even judge whether something is useful or helps to achieve some beneficial end in any way that we'd care about, one must have some axiological conception in mind.
Also, I really don't understand why your comment is so biting and aggressive and how you finding his posts helpful and useful is responsive to GP's point? Did GP offer some general critique of his posts? Maybe GP also finds them generally helpful and useful, but had a point to make about this specific post? Your entire response is generally strange and the rudeness is unwarranted.