Users have an expectation that when they create content it will be placed somewhere. As of now, it's easy to create content which is 'orphaned' from the rest of the site. When this happens, typically users have little idea of where to go to find it.
User expected to know where content would show up while adding it - i.e., didn't want to add something and sort out navigation to it later. This was an expectation from other CMSes - i.e. browse to a folder and add content to it.
By default, page content is 'orphaned' after creation. Users cannot find it (outside of admin/content/node - which isn't part of 'the site'). This also happens with new content types.
