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.
“Don’t worry. You aren’t dying out, just risk the fall of civilization as we know it and then the rest of humanity can live in some post apocalyptic societies. All good!”
Everyone’s already preparing to accept this new norm instead of actually doing something about it.