If there is an answer to a question that is not helpful for me, this question has nonetheless only few attention of experts. Even if there is an comment that the answer doesn't fix my problem, the question will not find another answer.
If I try to ask the question a second time, there is a great chance to get a link to my first question - another answer that doesn't help me.
To set the question "unanswered" could help to make it visible again.