True, Skyrim does offer less peaceful alternatives than previous games. This could be improved upon. Even then, I can still play a character that never has to fight and have an enjoyable game. I won't be able to do as much, but then a pure fighter can't do everything either.
Two words: Muffle and Invisibility. Voila! The perfect mix for never needing to fight anyone, ever... Well, actually you need to throw Lockpicking in there as well, or Pickpocket to steal keys.
As for the OP, remember that what launched the series into mainstream was Morrowind (yep, without it, Bethesda would have been a much different company now). It's combat system was, quite frankly, plain rubbish, yet that did not diminish the game in any regard. There's your proof on paper that combat has never been the central part of TES.