The point being, space expansion would prevent the sudden eradication of the human technological culture. Politicians, warmongers, prophets and priests will continue to fuck things up, but distributed redundancy means not everything is destroyed at once.
Anyways, who says Earth created "Politicians, warmongers, prophets and priests, etc.."? Kids fight among themselves without any of these lovely things to help them. As does everything in the living world.
You're being downvoted because you missed the point and continue to do so. Nobody said that earth created those things, or that going into space would somehow make us more compassionate. The point is that being spread out across interplanetary distances reduces the need for bad people to take truly drastic measures, and mitigates the damage that any particular disaster can do. Even if we a madman managed to blow up the entire world, as long as he can't do so to every world that humans are inhabiting simultaneously, humanity will live on.
