Since you obviously edited for my sake, I started playing at the beginning of BC so I am not a teenager that barely started playing. My argument to your final claim is this...
Lets say ten years ago you liked to go to a night club and this one night club called "World of Warcraft" was your favorite place to be. Now lets say over ten years and now with a wife and child you no longer like the things that you always used to like about night clubs... maybe they're too noisy now, not a good family place, too busy.. whatever. So now ten years down the track, you no longer go to the night club called "World of Warcraft" that you used to love, but now you go to a new favorite spot that better reflects what you have grown to like now.
So, is it the World of Warcraft nightclub manager's responsibility to change their club to keep you interested as your interests change? Or is it more reasonable that their nightclub continues to cater to their current target audience and you simply move on instead.
I think the second option is how the real world works.