I don't think the author is commenting on the general correctness or incorrectness of ChatGPT's output. Rather's he's commenting on its ability to automatically

I don't think the author is commenting on the general correctness or incorrectness of ChatGPT's output. Rather's he's commenting on its ability to automatically produce content that fills the role of bullshit. In the context of the bullshit economy (e.g., the bureaucrat who writes reports that nobody [reads] because he is paid to write reports that nobody reads because this inflates his manager's headcount and therefore inflates his manager's salary) this is all that needs to be said. It's tangential to uses of ChatGPT by someone who examines the output and selects what is useful via some kind of expert judgement, or who refines his use of the tool via API calls rather than naive text prompts to the default GUI.