an extended cut is when you take a movie, and re-insert deleted footage, thus extending the length of the movie, and in alot of cases, bringing the movie closer to the scripted version. the only 'personal creativity' contributed by the editor is in adding the scenes seamlessly. there's no need for anything more. the intent is not to re-tell the story, just fill in the gaps with what was once there.
if that's not your thing then that's fine. but don't declare something pointless merely because you aren't interested in it.
...and if you're worried about the warners shutting down the site, then you'd better go over to the Superman thread & warn everybody over there because the extended Superman cuts include HOURS of reintegrated footage