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.
Too many people can only think in binary. They see your argument and decide that doing anything would result in higher prices, lower living standards, etc. they don’t seem to be able to grasp a goal of riding that line for best results