[procaryote]

> The argument that culturally homogeneous teams perform better due to more efficient communication (more is "already understood" at the outset, so there's less need to communicate explicitly, and fewer misunderstandings) is also sound.

Did you just define Groupthink, but in positive sounding words?

[akoboldfrying]

Did you just fall prey to the commonly groupthunk idea that things with downsides must also have no upside?

[procaryote]

Is that even a common idea?

[robocat]

I suspect commonly called black-and-white thinking. I think splitting describes what they mean although I've never heard that term used in my circles: https://en.wikipedia.org/wiki/Splitting_(psychology)