That kind of text is valuable as a signaling exercise - the author is willing to claim the text as indicating their actual beliefs. Writing it with AI would act

That kind of text is valuable as a signaling exercise - the author is willing to claim the text as indicating their actual beliefs. Writing it with AI would actually damage the author's credibility since it's no longer their words - although this shouldn't be a problem if the author is carefully checking the text every single time to make sure it represents their position. The effect would be even worse the first time the author missed a mistake from the AI and had to walk it back publicly. Nobody's going to trust anything they put in writing for a while after that.