I've been on both ends of the argument, and have come to realize the A-word gets abused and misused in the context of games so much it's not even funny. Real life accomplishments are quantifiable and are testament to what makes you as a person. And unless you're talking about world firsts in Heroic/Hard/Extreme mode, ridiculously high scores that require high amounts of skill to achieve, or completing set ups and situations that require meticulous planning, video games are never part of that list. Nihilum feeling accomplished about clearing Vanilla and TBC WoW and being the #1 raid guild in the world makes sense. Paragon got no argument from me when they were world first in killing Heroic Lich King. The dude in the video I linked probably also feels accomplished (to my knowledge, no one has broken that high score yet).
Sorry, but I'm not going to stop opposing people who want to derive accomplishment from things that will adversely affect others for the sake of their own egos (in this instance, because then we get crap like TAU and my friend the directionless who refused to do anything related to Aht Urghan after he lost a whole level dying while trying to get to an imp party). There's plenty that exists from which to derive feelings of accomplishment. I'm sure you'll be among the first to rush into the Coil of Bahamut on extreme as soon as you meet the item and stat requirements, so have a little patience.