The hunt for the Four Horsemen of the Apocalypse started as soon as the world message for it. Some guilds that were not doing any raids immediately flew into action when they received it as the world mission rewards and world quest fame is not something to be looked down upon.
Some of the spotlight of the hunt for the Horsemen of the Apocalypse might have been shifted due to the Selvaggian quest but that does not mean they are looking down on it. Mythical Tier Weapons is not something anyone currently has or at least known in Pandemonium. There have been legends about Mythical Tier weapons being able to injure elder dragons or ancient beasts.