I'm not sure he intended it as an insult. Despite not using LLMs for HTML or JavaScript often (if at all), I was under the impression that it was one of their strong areas.
In my experience, at least in circles I've been around, I have found other developers who are a little too high on their own supply so to speak use "hurr durr web dev" as the "easy not real dev" insult.
So I both wanted to shame that in case they were and also categorically show otherwise.