"Somewhere out there, in the vast nothing of space..."
"Somewhere out there in the vast nothingness of space
Somewhere far away in space and time
Staring upward at the gleaming stars in the obsidian sky
We're marooned on a small island, in an endless sea
Confined to a tiny spit of sand, unable to escape
But tonight, on this small planet, on Earth
We're going to rock civilization"
THAT is the only rational perspective. Humans have discovered an inhabitable planet that can be terraform manipulated. That name of the planet is Earth. If humans can't terraform earth successfully, they sure as hell can't do it on a planet they somehow find 100 million travel years away.