What all we know, we (i.e. academia.SE) are hacking the system for objective verifiable Q&A for the purpose of advise questions. (And, IMHO, we have hacked it successfully).
However, I have some doubts when it comes to accepting answers. On StackOverflow it's obvious if an answer solves your problem. Then, out of such, you can choose the approach you actually took.
For soft-questions you don't have "I copied and pasted your code, it works, thanks". Usually there are piece of advice and wisdom in many "answers". And none of it "solves" the problem (actually differences in opinions are often fruitful and show academic landscape).
Of course sometimes there is an answer which is worth to be singled out among other. But in other cases, when there are more compelling answers - what to do?