Not at all. The only similarity is that LLMs work with text, and the document formats can also represent text.
Each format (E.g pdf, json, excel) has a defined standard, so all you have to do to change between each other is to map one format’s fields to the others. You don’t need (and won’t get good results) from having an LLM produce the new format from scratch.
What he’s asking is the equivalent of asking if there’s an LLM made specifically for solving arithmetic problems. Why would you try to solve addition using an LLM?
This is true to the extent that you won’t be solving Organic Chemistry 1 or Linear Algebra exercises at your workplace, but I think it’s misleading. If anything, from my experience, people focus too much on producing the results and not enough on learning the skills. A lot of people stay on the mindset of “I only need the degree / where am I going to need that / the industry has moved on from this” and don’t build strong foundations