Rather amusingly, the author recently espoused the viewpoint that bloggers who wanted to stand out should avoid using tools like ChatGPT: https://youtu.be/avASDgtw9k0?t=678

It's not obvious to me that this blog post was synthesized whole cloth from an LLM. On the other hand, in that same interview, the author encourages the use of LLMs for idea exploration, and it's entirely possible that this is what he did.

In fact, using an LLM in this way may itself may be an SEO trick, in the sense that he simply wanted to boost his search rank (inasmuch as it's still the case that longer articles are more highly ranked) by beefing up what would have otherwise been a very short article.