Controversial, but: Skill issue.
I do a lot of FOSS work. I dont write docs for everyone most of the timr. I write docs for those already educated on most of the items. This still applies, and is accessible to anyone:
If you don't know the word, look it up in the dictionary.
I don't want to downplay frustrations, I know those are real, but most people writing these things aren't paid.
Note: If a Dev complains their idea isn't adopted and the docs suck, that's another story.
Edit: And the article seems to be by a career writer, so it makes sense from their perspective, but some more expansive thinking on their part about how a developer isn't staffed to do their job, too, would be helpful.