The title (currently "OpenAI's accidental cyberattack against Hugging Face is science fiction") suggests some information had been hidden that makes the incident less significant than claimed. The article argues the opposite, and the last two words of the full title are "that happened."
Looks like it's been edited now and makes more sense
"OpenAI’s accidental cyberattack against Hugging Face is science fiction that happened"
I think you were reading "... is science fiction" the wrong way out of two possible interpretations. I don't think "it's science fiction" meant "it's made up". I think it meant "it sounds like something you'd read in science fiction (except this time it's something that actually happened)".