Exactly what I was going to say. Oblivion was the first Elder Scrolls game that had level scaling. It's just extremely lazy design that ruins any sense of progress/immersion. In Oblivion/Skyrim there are plenty of mods that remove the scaling, and end up with worlds that are vastly more interesting and immersive. I highly recommend Requiem.
I hate hate hate level scaling. I believe they also introduced it to WoW, which ruins the power fantasy of going back to a lower level area and kicking butt, or the fear of venturing in a higher level area and hauling ass out of there. I agree, lazy game design.