Eh, I doubt he's made many fascinating insights so much as he's compiled them. He seems like he's trying to be The Great Educator of Rationality, and despite the verysmart pedantry I can get behind the sentiment. On the other hand, conceptual precision (i.e. pedantry) is pretty important to clearly expressing precise ideas, which is one of the bigger functions of communication in the first place. It is difficult to provide instruction on clear and deliberate reasoning without coming off, at least in part, as a pedantic dork.