I might reframe the comment as: are you actually using LLMs for sustained, difficult work in a domain that has nothing to do with LLMs?
It feels like a lot of LLM-oriented work is fake. It is compounding "stuff," both inputs and outputs, and so the increased amount of stuff makes it feel like we're living in a higher plane of information abundance, but in reality we're increasing entropy.
Tech has always had an information bias, and LLMs are the perfect vehicle to create a lot of superfluous information.
He is a researcher who understands neural networks and their architectures exceptionally well. That is all.
And that is precisely why he is more qualified on the subject than your average vibe coder!
E.g., you can see a post from a user named dhouston, who mentioned that he was thinking about starting an online file sync/backup service of some sort.