It doesn't have to, it can be much more. Quora is just an intelligent platform gathering intelligent people to answer questions. Musing could be much more, but it does need to bring together dedicated people who enjoy a sense of educated and elevated community.
Trolls are the number one enemy of such a platform, since the number of people who answer questions will avoid stepping into an offensive area.
There are people and people and today, I am writing here. A little less than an hour ago I answered on Quora :D
So while it might be or might not, the steps are in place and content creators are in both places.