While I agree that it is their own choice of how to play their game, these single choices, when added together, affect the world overall. This is my first mmo, and I have noticed some elitism. If you don't want this game to lose support, you'd think that as a whole the community would understand that shunning new players is a bad idea. But if everyone acts like selfish children, then this game will lose support, and there will be less people playing.

Imagine if Micheal Jordan refused to play with anyone who wasn't as good as him?

A good player is just a good player, a great player makes those around them better. Besides, most complain about how boring the grind is when they could easily mix it up by helping out a few new players. Who knows, they might become "good enough" to dungeon with you someday.