That is kind of a nice answer, and it has some factual merit to it. However, if the game is not for "anyone who is not already playing" ... then there is no new growth for WOW, and WOW goes away rather quickly. Selling WOW to new players is a very non-trivial task - if it were simple WOW and other MMORPGs would be growing quite nicely. If you dismiss all of your potential customers, you won't get any new ones.Let me see if I understood that correctly.
Your friends used the boost and got overwhelmed because they didn't have pre-100 experience playing their characters. Then they made new characters and got frustrated because they weren't leveling fast enough?
I think I need to repeat - this game just wasn't for them.
The OP started a discussion about what can be done to make WOW more appealing to new players. Your response seemed to be to dismiss the idea of trying to make the game appealing to them. I am with the OP on this one.