[solinent]

Non-binary is literally the categorization, I wouldn't say they avoid categorization at all. See, by "they" I could mean anyone, so it doesn't necessarily refer just to non-binary people.

If I had two colors on a spectrum, lets say blue and yellow, we wouldn't call the middle of the spectrum "color", we'd call it "green".

> Why would a new set of pronouns be needed to categorize such a non-homogeneous group when neutrality already captures everyone between the normal binary categorizations?

I think this is the issue, it doesn't necessarily capture them directly. I think there is merit in having a pronoun, but it shouldn't be forced by law (as it is where I live). It doesn't arise naturally probably because there are many different categorizations in the middle and most people are on the poles, which I think is fine.