Various people are once again discussing the difficulty (or lack thereof) of WoW. I don't really understand the fascination with this topic.
Here's a some cold, hard truths:
1. If an activity is hard, most people who attempt it will be never be successful.
2. Fifty percent of all people are below average.
So what does this mean? Let's say you made questing in an MMO to be of average difficulty, whatever that may be. Congratulations, you just eliminated half of your potential customer base! I'm sure your shareholders are thrilled with the purity of your Vision™.
The basic activity in your game must be fairly easy. Questing should be easy enough that 90% of all potential players can do it. (And judging by the fact that people seem to need addons like Questhelper, it isn't there yet.)
After that, you can scale difficulties upwards. 75% of players can do regular dungeons, 50% of players can do heroics, 30% of players can do normal raids, 10% of players can do hard modes, and 0.1% can do the single hardest fight in the game.
To my mind WoW has done a very good job of providing content of appropriate difficulty for everyone. There is something for people of every skill level including those people who are not that skilled. Providing basic gameplay that low-skilled players can do is just good business sense.
If you think WoW is too easy, maybe you should step up to the next level of challenge.