Stop it, please. Em-dashes are perfectly fine. On a throwaway Reddit-post, no. I understand the signal. But on a corporate publication or some other piece of professional writing, absolutely. Humans do use em-dashes on those.
In the worst case, this is like "We released this sycophantic model because we're brain dead. To drive home the point, we had ChatGPT write this article too (because we're brain dead)."
I tend to rely on AI to write stuff for me that I don't care too much about. Writing something important requires me to struggle with the words to make sure I'm really saying what I want to say. So in the best case, if they relied on ChatGPT so much that it left a fingerprint, to me they're saying this incident really wasn't important.