Alpinist wrote:It's far more important to have been there if you are the one that is writing the Mountain or Route page...
With rare exceptions, IMO it is essential that you've done the mountain or the route before you author a page on it.
As for merely voting on pages where you've never done the subject, I think it depends on the type of page. It's probably not very meaningful to vote on a route page (especially technical routes) if you've never done the route since you won't be able to evaluate its helpfulness or accuracy.
On the other hand, you can evaluate useful formation on most mountain pages (e.g., how detailed are trailhead directions, listing of route options, links to getting weather and permit information, etc.) without having summited that peak. And of course a TR is an entirely different beast which you can evaluate for its educational and/or entertainment value without having done the outing or epic.