I don't see that sentence anywhere in the guide. Where did you find it?

That wasn't a real quote. I guess my sarcasm didn't transmit to text.I found the entire article so ridiculous that for a moment I thought it was satirical.

The actual quote was this:

"Em dashes are great for inserting clarifying details, quick shifts, or sharp asides—without breaking the sentence. I love them. When used well, they add rhythm and emphasis. They help writing flow the way people actually talk."

I think you missed the point. That section is asserting that people wrongly assume em dashes to be a distinguishing trait of LLM output, while in fact they are good tools for human writers (as the author demonstrates).

I didn't miss the point—you missed mine.

Deciding you like em dashes— and writing a blog post saying so—because an AI told you they were good for human writers—is funny behavior—even if "you" weren't LLM output masquerading as an author.

It's very generous of you to assume a "human writer" wrote that blog post—is it not?