<blockquote>
  <p>If I try to search for certain things, those questions [dead questions] pop up, they don't help me at all.</p>
</blockquote>

<p>Your suggestion (system/mod accepting Qs) would not make those dead and unhelpful questions to go away. If a dead question has a valid/useful answer, upvote it so it can be removed from the <a href="https://stats.stackexchange.com/questions?sort=unanswered">unanswered questions tab</a> (if possible and necessary, also edit the question for better quality).</p>

<p>If it is a dead question (with unhelpful answers or without answers) make the difference by pushing some of those questions to cross the <a href="https://stats.stackexchange.com/help/roomba">Stack Exchange auto delete bot</a>. For example, take a look at my answer in 
<a href="https://stats.meta.stackexchange.com/questions/5524/why-was-my-question-deleted-if-it-was-not-even-on-hold-nor-closed/5537#5537">Why was my question deleted if It was not even on hold nor closed?</a>.</p>
