This is by design! When the rest of us got to the same point, those were the top dungeons in the game. Many ran them hundreds if not thousands of times. (see achievements for doing it 100 times) What you're suggesting seems to be let new players skip ever more content and give them for free even more goodies we had to work hard for. The main story already gives away a whole lot, and doesn't teach the necessary skills for the higher content as it is.