Off topic: Lacks... personal touch. That's exactly what I find wrong with AI writing. Good writing has the author's voice. Corporate writing has no personal voice; that's why everybody hates reading it.

AIs train on all the text of all the web (that they can get, at least). A lot of that text is "corporate voice" (that is, written by nobody). But even the rest, the AI blends it all together. As a result, in the output, there's no voice - or rather, all the voices all blended together, which doesn't sound like anybody.