If you don't take some time to explore Robin Hanson's ideas in good faith you will miss out on a lot. What you see as a weakness is in fact his great strength as a rationalist. "Curiosity about humans and unconstrained by social norms." You may object, saying that you don't mind this, but any such response basically boils down to "I like X when it isn't too X."

The red flags aren't there because he is unaware of their existence. Indeed I bet Hanson can win quite well at social games. They are there because he systematically relies on his explicit/theoretical rather than implicit knowledge to expose where the gaps of the former are and then tries hard to fill them.