Place all achievements in PvP only.
You’re creative anarchist, so I guess this is high sarcasm.
If life gives you an PvE, don’t farm stuff.
Make life take the PvE back!
Get mad! I don’t want your kitten PvE! What am I supposed to do with it?
Play an MMORPG running around enjoying exploring and farming?
Make life rue the day it thought it could give Guild Wars 2 PvE! Do you know who I am? I’m the man whose gonna burn your PvE down – with the PvP!
I’m gonna get my engineers to invent a combustible PvP that’ll burn your PvE down!
The point is. PvE is an important part of MMORPG’s and so people join people who only enjoy PvE join the game. This group of people needs to be kept alive. ArenaNet is giving them some extra stuff to do: Achievements.
Hope you understand this reason why achievements could never be PvE only..