Wehad a junior engineer do some research on a handful of different solutions for a technical design and present the team, he came up with a 27-page document with 70+ references(2/3 of which were reddit threads), no more than a few hours later after the task was assigned.

I would have been more okay with AI generated code, it would likely have been more objective and less verbose, I refused to review something that he obviously didn't put enough effort himself to do a POC on. When I asked for his own opinion on the different solutions evaluated he didn't have one

It's not about the document per se, but the actual value of these verbose AI-generated slop, code that is executable, even if poorly reviewed, it's still executable and likely to produce the output that satisfies functional requirements.

Our PM is now evaluating tools to generate documentation for our platform based on interpreting source code, it includes description of things such as what is the title and what the back button is for but wouldn't inform valid inputs for the creation of a new artefact. This AI-generated doc is in addition to our human made Confluence docs, which is likely to add to spam and reduce quality of search results for useful information.