In my experience, the social issues are actually closer to perception deficits than reasoning problems. It's harder to "read" emotions and faces and to predict other people's behavior, but just because I have trouble perceiving these things doesn't make me any less rational. Picture someone nearsighted. They are aware of their perceptive deficit, which impair their ability to predict what they will encounter as they travel. Is that person less rational due to their perceptive deficit, which impairs their ability to form models of their environment? (Yes, I am trying to get more precise perceptive abilities, but only to the extent that this is actually a good use of my resources.)

If a paperclip maximizer had significant trouble counting paperclips, would you say it did not care about paperclips? Similarly, I care about other people's preferences, even if I am worse at detecting them than the average human.