No, using an em dash a lot isn’t a sign of AI because the em dash is not punctuation, it’s a vibe. It’s a feeling. You don’t use it because it makes grammatical sense — you use it because your heart tells you to. AI couldn’t possibly do it well because it lacks one.
Sometimes I forget that I really sat for 5 hours to get my whole sternum blasted with no numbing or pain meds and when I remember I develop a god complex