You do realize that even in instances you could fail, right?  Wipes still happened and encounters had to be ground out well through the game as I played it (and even through now I'm sure.)  Instances didn't necessarily cater to every player, you still had to put in the work to meet the requirements for victory, but it didn't just cockblock you because 140 people joined one guild that took every single piece of content away from the rest of the playerbase. 
		
		
		
		
		
		
		 |