I found "Better Offline" through "Tech Won't Save Us" where Ed is occasionally a guest. It also has some critical takes on technology if you are looking for more of that content.
More seriously, you described a great example of one of the challenges we haven't addressed. LLM output masquerades as thoughtful work products and wastes people's time (or worse tanks a project, hurts people, etc).
Now my job reviewing work is even harder because bad work has fewer warning signs to pick up on. Ugh.
I hope that your workplace developed a policy around LLM use that addressed the incident described. Unfortunately I think most places probably just ignore stuff like this in the faux scramble to "not be left behind".
Definitely no reason to worry about an entrenched oligopoly there.