In short, we aren’t on track to an apocalyptic extinction, and the new head is concerned that rhetoric that we are is making people apathetic and paralyzes them from making beneficial actions.
He makes it clear too that this doesn’t mean things are perfectly fine. The world is becoming and will be more dangerous with respect to climate. We’re going to still have serious problems to deal with. The problems just aren’t insurmountable and extinction level.
Human expansion into space is anything above that and the idea that it is is just meaningless capitalist propaganda. Human expansion into space consists of:
Building space solar power stations (SSPSes) to beam power down to the Earth 24/7 to replace the coal plants
Mining calcium and magnesium from the Moon and near-Earth asteroids (NEAs) to bind with the excess CO2 in th oceans to stop and reverse ocean acidification
Mining rare-Earth elements from NEAs to mass-produce electric cars and batteries down here ln Earth to replace gas vehicles
Build O’Neill cylinders to preserve and rebuild ecosystems in safe places where poachers will never be able to reach
Among other things.