When you need to cover all these subtopics, user intent and questions in topical depth , then you have a chunky big quantity of pillar library, which is not possible to write with AI, or the other way aorund; yes you can write it with help of AI ,then for a big pillar library you need months to finish it.
Whereas big media newspaper sites, big sites who dominate google seo global, they have money, they have a team and they have AI models far beyond than cluade, gemini or chatgpt to build a big pillar library the fast way.
And most website visitors not read long form chunky pillar pages.