It is a writer. It writes.
You can ask any writer to write such a thing, using examples, and they could write similar things.
The real problem is that this will get deployed to the internet- there will be people reading HN today that are writing SEO optimised websites, with thousands of articles on a topic, that will just spring out of GPT4's writing, fully formed.
GPT can find the topics, pick a domain name from available ones, churn out the articles. It can all go into templates, with different AI generated graphic design supporting it. Ad supported churned out rubbish.
The writing style can change site to site, long form, short form, informed by current events, whatever. GPT would happily provide the prompts for this variety changing the style based on the topic and target audience.
It seems inevitable to me that the web WILL be full of such sites, and worse, they'll fill the comment sections on "social" sites too.
But? Banning AI isn't the answer, if for no other reason than it wouldn't work.