In my time modding Oblivion, I put out a lot of stuff. While doing so, I wrote, played, fixed, retested, fixed again, and tested again and eventually got to points where I said "this is done". Only to turn it over to Dwip or Hanaisse or whoever and get back reems of bug reports for things that were utterly broken. Sometimes I'd be scratching my head wondering what went wrong, other times outright frustrated that it didn't seem obvious how it was supposed to go. This process repeated itself over and over, with each QA run turning out less and less bugs until eventually we all got to a point where we weren't finding any more. Upon release, it is inevitable that the players found yet more bugs, some of which were STILL mod breaking bugs. Why? Players are completely unpredictable.
So devil's advocate here for a moment. Magnify my experience here 1000 fold. Bethesda has a bunch of people writing up the equivalent of 10,000 mods all at once. They played it, tested it, fixed what was obviously broken, and when each person could find no more, they gave it to their Dwip's and Hana's for further QA. This process went on for 5 long years until they could find no more bugs. They released the game. Players found yet more bugs, some of which are quest breakers, and I'm sure folks back at Bethesda are going through the same head scratching and frustration on a level NONE of us can possibly imagine.
One can only spend so much time fixing things to a point where they work most of the time before getting completely sick of looking at it, or becoming so intimately familiar with it that they just can't see the problems anymore. It may come off as insulting, but I honestly don't think non-modders can ever understand this.
That said, if the company is made aware of the problem, much like modders are told their mods have bugs, they should be willing to accept this and incorporate the actual fixes to the problems in an official manner rather than just ignoring it and hoping for the best. Much like we modders don't like it when folks make unofficial fixes for our work, I suspect the content developers have a bit of the same wounded pride that the company tolerates unofficial patches to their work rather than giving them the chance to fix it properly.
Remember, deadlines are set by management and the publishing arm of the company. There will come a time with Skyrim that they declare themselves done and no more fixes will be forthcoming. IMO, THAT is when the unofficial patch creation should begin in earnest.

