The sad thing is that I think the book does have some genuine insights to offer. If you can work your way through the verbiage and manage to grok the stuff about systems design, there are (to my mind) valuable ideas about the very abstract notions that form the root of tabletop RPGs. But getting there is a lot of work, arguably more than it should be, and that's a shame since it means that the book's message will ultimately be lost.
All I will say is that you are more generous in this assessment than I am.