It is in my understanding that StackOverflow is a self-driven community Q&A. As such, questions, answer and comments are valuable. A Google search is enough to meet the big StackExchange community. A non-community member would search information based upon value and other people might do it too.
When I post something and there is no vote nor any comment, it basically mean nobody will get it. The idea I was trying to communicate is a failure. Natural flow will put the non-valuable question in the deepest oblivion of unanswered/ignored question so it will become less likely to appear as a Google search result.
Should I delete my own unrated questions/answers then?