Just to be clear, the article itself was written by him; he was just experimenting with an AI tool to extract quotes (because learning about AI tools is literally his job), and because he had COVID at the time he got mixed up and pasted paraphrased quotes rather than original quotes. (Arguably he should not have been experimenting with a new tool while sick, but I am willing to cut him some slack because he was probably not thinking clearly at the time.)

The serious thing here is actually not so much that he used an AI tool at some point in the process but that fabricated quotes ended up in a published article.