ArenaNet replaces Guild War's Monk with the better armed and armored Guild Wars 2 Guardian, a brand-new fighting profession that can sacrifice its own defenses for the sake of its allies. Where did the Monk go?
There are no dedicated healing classes in Guild Wars 2. One of developer ArenaNet's goals in creating the second generation of its free-to-play MMO was to do away with common role distinctions like tank, damage-dealer, and healer. That meant the Monk, Guild Wars dedicated healing class, had to go.