Typically, when there's a story-identification question that lists several points; and that question has a bad answer (e.g. an answer only stating the name of the work with ZERO information on how that work matches the points raised in the question); I downvote/flag/delete such an answer.
Why? Because there's no way for the reader to judge how correct the answer is, so it should be judged as "incorrect".
Should the same be applied when such a bad answer is provided by Original Poster of the question themselves?
On one hand, they KNOW for sure this is the correct answer. We don't have the same reason to downvote as the "why" above.
On the other hand, it wouldn't be fair to judge what would otherwise be a poor answer as "OK" merely on account of who posted it.