Because articles are high level summaries of detailed work. What's self defeating about that?
> that is harder to do when there’s no mind behind the words.
Presumably the author read the text before publish and agreed with the summary. What's the problem exactly?
The problem is that it’s distracting, lowers the quality of the writing, and one has to be cautious that random details might be wrong or misleading in a way that wouldn’t happen if it was completely self-authored.