For executives looking to impress? Not really. Being able to rattle off perspective on a book, curated by someone with very high media literacy would signal the same level of media literacy to their audience.

An LLM may be able to synthesise results well each time, but there will be quite a difference between a synopsis written by an LLM and someone whose job it is to write synopses of books.

Huge difference in quality, and considering the clientele, they are willing to pay for that quality.