What is the benefit to have such a system at all? For each question, there are many perspectives on it. Various presentations can reach wider audiences, if they are on topic, well written, and show some degree of relevance.
The StackExchange platform is intended to encourage good questions that others can use, as well as good answers to those questions. Until an objective measure of "good" is determined, one has to approximate it by how useful it is to the community. Even then, community utility is not easily measured; votes and reputation are measured easily however, and serve as an effective filter for determining "good".
Your question might be better answered by comparing this platform to other platforms. As an example, before StackExchange and MathOverflow, the USENET newsgroups sci.math and sci.math.research were (in my view) the closest to providing anything like the services we get today. Sci.math got overrun by spam, and moderation services on sci.math.research were small enough that (among other reasons) resources constrained it to have a small flow and user base. Even the collection of mathematical newsgroups on USENET lacked the advantages the current platform has, the primary one being involved community moderation. Votes and reputation may not be ideal; that should not keep you from designing an even better platform. Better here includes community approval and participation, so be careful about your design.
Gerhard "Ask Me About System Design" Paseman, 2015.05.29