I agree. Feynman was incredibly intelligent, musically inclined, and charmingly social. Anyone who feels out of touch with (perceived inferior) normal people due to being too smart is creating a hierarchy of people which places them just one step off the bottom. At the same time they present as if their position is the top step on the ladder.
People pigeonhole themselves into categories based on RPG mechanics. In their head, they're at Intelligence 10 so that must mean that they had to sacrifice Charisma. The real world doesn't have game balance. People will turn out to be smart and funny and kind and good looking. To make it worse, these will correlate.
And besides, the idea of intelligence resulting in damaged social skills is odd. Being able to generalise and make inductive conclusions is an important skill that is substantially helped by being intelligent. Making social decisions the long way (thinking through them) is inefficient. An intelligent person who's doing that is just poorly using their time.
Not saying you're wrong at all (in fact I agree), but I think that an important thing to remember is that smart people still have limited time like everyone else, hence they will probably be less enthusiastic to fritter it away on "meaningless" social interaction and small-talk when they could be doing something they consider useful, challenging or stimulating.
This tendency IMO tends to make some smart people less adept at social interaction, just because they do less of it. Not all smart people, but definitely some of them. Probably everyone knows an intelligent person who is socially awkward.
So that's another influence. But it's all generalizations.
People pigeonhole themselves into categories based on RPG mechanics. In their head, they're at Intelligence 10 so that must mean that they had to sacrifice Charisma. The real world doesn't have game balance. People will turn out to be smart and funny and kind and good looking. To make it worse, these will correlate.
And besides, the idea of intelligence resulting in damaged social skills is odd. Being able to generalise and make inductive conclusions is an important skill that is substantially helped by being intelligent. Making social decisions the long way (thinking through them) is inefficient. An intelligent person who's doing that is just poorly using their time.