I think the point is that automatically-generated documents by LLM is lower quality the manually-generated ones or at least guaranteed lower quality than automatically-generated + manually-reviewed.

Therefor if you are not putting human effort on the document it is low-value.

We have seen this before when big data started to be a thing, tons and tons of reports being auto-produced weekly (or even daily), but even if they contain relevant information they are low-value because no one can take action on so much information.