

Yes, but most human em dashes are from writing going through relatively professional processes, not, say, writing a comment online. Of course, there are many — like myself — who know how to type them quickly, and choose to use them, but LLMs are definitely a lot more eager to use them than the average person.
This is a good point, we should ask some average North Koreans directly, that way we get a better balance of viewpoints. Maybe we can catch some on a vacation abroad or something.