It also eliminates pretty much anything that requires subjective judgment (e.g., what are some good books
I've seen some of those answered wrong, where someone read the front page text and leapt to a recommendation without reading any of the inside (e.g. "not looking for this / with the aspect of this / dealing with this topic from this point of view" etc.).
Huh. But if a "wrong answer" is just an unhelpful one, or one that ignores the poster's wishes, then any question can have wrong answers.