As a geek myself (or so I like to think), I disagree.

I’ve worked and been friends with, for example, people from creative areas, and it’s definitelly a much greater whole than the sum of the parts when you put people with such different ways of thinking together.

There are some quite massive blind spots in the typical geek-style way of looking at and going about things, IMHO.

I suspect that there is some other factor, maybe something that most geeks have but which is not only geeks who have it. Tentativelly I would say some kind of drive to create/make/contribute.