I wasn't trying to say that all exceptionally intelligent people believe that they have no need for social skills because they are so smart. In fact, I brought up an example of the opposite.
And I agree with you that it makes sense that people would prefer to pair up with people of similar "technical" intelligence as them. However, I doubt that if you take a potential couple, where both people possess "technical" intelligence but only one possesses emotional intelligence, that person is going to be very willing to be with someone who lacks it to such a severe degree.
Leading me to a conclusion that a lot of very "technically" smart people are limiting their already narrow pool of people of similar "technical" intelligence level by not working on their emotional intelligence/social skills.
When one gets out 2, 3, 4, 5 standard deviations from the mean, there's only a very small number of others of similar intellect. Very very very small at the high end.
The chance of finding someone who is of compatible intellect and who is also compatible in even basic other ways is extremely small.
This accounts for the results of the study. There's no need to propose mechanisms whereby the exceptionally intelligent somehow foolishly believe that their intelligence gives them a pass, which it obviously doesn't. Mere observation and life experience shows that to be the opposite of reality.