I'd say this can be generalized: threads on HN are goofy about all the kinds of things HN readers and hackers are unfamiliar with but think they have the common sense to reason about.

This week I witnessed a similarly illogical argument between someone who thought they could argue about AI in movies and someone who actually works in the movie industry and has years of experience. The hacker was lecturing the movie person about why they were wrong about the future of the movie industry, with zero experience to back it up other than "I dabble in AI and watched some movies".