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.
It’s like the world is desperate to recreate AppleTV+’s show Extrapolation, where companies just kept negotiating to raise the world temperature target cap. The red skies many people in the US were seeing were finally a wake up call to some.