Posted 15 August 2012 - 09:04 PM
Teeeechnically speaking, resurrection and revival are both lore concepts in GW and GW2. It's the whole difference between Grenth, who's cool with stuff like resurrection and undead, and Dhuum, who preferred 'Death Eternal' - once you die, you're dead, end of story. That's why you can play a necromancer; Grenth is in charge, not Dhuum, so undead are allowed. So it's also why you can come back from the dead.
Now, as for 'why would anyway die', my reply would be the classic D&D one - revival is likely very difficult and probably very expensive. For humans, you'd have to ask a boon of the gods to bring someone back from the dead, and they aren't feeling very boon-giving at the moment. The Norn would have to request it of Raven, and who knows how forthcoming he is. Probably just says 'Nevermore' at you and flaps off mysteriously. The Asura, Charr, and Sylvari; unsure. The whole mechanics of a Sylvarian soul and afterlife are unknown to me - for all I know, they cease to exist when they die, with no soul passing on.