Its possible to be 90% resistant against player who has chosen condition gear and build, but not possible to be 90% resistant to normal damage geared player. Therefore Condition geared builds in PvP do face enemies they cant kill in any way even if they try 10 minutes in a duel. But Normal damage builds/gear doesnt have similar opponents that would be 90% resistant to their damage..
I understand its important to have skills against conditions, but for some classes those are so powerful they are completely impossible to kill if you choose condition build for any of your characters. Think if some would be immune to normal damage, why isnt that implemented too if its possible to be immune to condition damage ?