If we don't have enough of either one of these two things, the site won't be successful. The importance of voting it critical as it surfaces the high quality content and makes it easy to find.
Only be creating a place where high quality content is accessible and easy to find, will we create value and a reason for people to visit MR. If we build strong enough value for ourselves and others, we will have a reinforcing feedback loop that will maintain and grow the site on its own.