They're used 4 times (6 instances of an em dash, but it's two uses of a single em dash and two uses with paired em dashes) in the article over 16 paragraphs. That's not really "all over" unless 4 is a big number for you. What's with these kind of comments, any one who reads the article could tell that what you wrote is nonsense so why make up bullshit like this?
This is a style article about it, from 2019, long before ChatGPT: https://www.nytimes.com/2019/08/14/style/em-dash-punctuation...