I don't disagree. My two examples were people who not only did not collaborate, but actively resented the knowledge offered from experts different fields.

I do think that past successful collaboration can lead to a bias though. As a programmer I've solved problems for a variety of disparate industries and fields. I know just enough to know I'm vastly ignorant of those fields save for a little part that I helped solve problems for. But I've seen colleagues go the opposite route.