Quoting Glazunov1, reply 64But it was a nuisance, and didn't make modders feel any too happy about Bethsoft when we discovered some of the "shortcuts" that had been taken in the game.
Gonna be a bit blunt here, but that is only because you were trying to mod the game, I do not think the developers always "thinks in those lines" when coding the game
Then again, what do I know, I just know I stopped playing Skyrim after it became moddable, too much of a headache to manage.
I think in Oblivion they didn't take modding into consideration, other than to use several of the best thought-of mods in Morrowind to provide many of their "new" features. In Skyrim, and under a different development team--and what follows is *just* my opinion--I believe they simply left a lot out knowing that modders would pick up the slack. So the cities are tiny, the shops are few, quests pretty short, and items very few. Modders reacted much as you'd expect.
I'm not sure why you'd stop playing Skyrim after mods appeared, though. If you didn't want to manage them, you only had to ignore mod sites like TES Nexus completely, and load nothing but the main game.