I can understand a couple of pieces from the top tier being craftable, maybe mods and enhancements only. But you shouldn't be able to craft and GTN purchase the best gear in the game w/o stepping foot into the operation. Why not allow the crafting of elite war hero and let people craft and GTN sell that?
I wouldn't mind that, but the obvious difference is that PVE gear is used to fight NPCs, so if you choose to "earn" your gear or craft it only affects you and your team. PVP gear is used to fight players, so it affects the enemy team too.