From the moment of birth, Extraordinary civilizations face a question: why should Extraordinary individuals be concerned with the continuation of civilization?
That very question sounded callous and illogical, but it was indeed as the question puts: Setting aside the emotional portion, the most powerful Extraordinary individuals simply did not have to be concerned over the prolonging of civilization. Their very existence was equal to or perhaps superior to an entire civilization, while their might and wisdom could crush the composite of billions of normal individuals.
A point in case were Legendary champions.
Each of them has the individual ability to destroy Starfall Era Mycroft. As long as other Legends did not act, they would easily subjugate the world and turn all civilization into their plaything—even William the Mind Lord, the one who had the least capacity for physical destruction could turn billions into his puppet through widespread brainwashing.
