based on at least two examples i've seen, author bots do exist
TBH I was wondering the same thing
IMHO "article writing software" produces garbage. Use of inappropriate words, wrong tense, poor sentence structure, etc. etc. ad nauseum.
But then again, it seems many people have similar writing skill. Who knows? It might just be true that some software is capable of producing better content than some people.
Still garbage nobody would want to waste their time reading, but just the same.