I see this kind of the comment--legible, complete sentences, no grammatical errors, but otherwise totally missing some basic element in what they're replying to--from time to time, generally only on HN, and I wonder if they're edge cases from some kind of bot school.

Did you have to be rude about it?

Parent obviously read the comment (which doesn't mention any particular movie in its text), but didn't follow the link, assuming it was about Dune (which was the context that started the subthread).