Based on a sample of one (planet), and a subjective assessment of the "knowledge and capability" of our species.
One can make the opposite argument with just as much evidence: The human race has a huge destructive capability and potential, so let's imagine how not to spread that off our home planet.
One can make the opposite argument with just as much evidence: The human race has a huge destructive capability and potential, so let's imagine how not to spread that off our home planet.