Creating dichotomies is central to mathematics and science. Humans tend to think of things as being either "in" or "out", and apply this distinguishing ability to every facet of life. It is not surprising that pretty much everyone is creating little dichotomies in their head which shapes their worldview. That's kind of what models do too, they draw lines in data and categorize things. It's easier to understand things if you can decompose them into orthogonal vectors in your mind.

I agree that it can be dangerous if you create a false dichotomy, because that can lead to a misunderstanding of how something works.