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.
I think the issue here is who you’re looking at for the audience. At this point, we can agree that anyone who doesn’t think there’s a problem is delusional, and it’s a waste to time to convince them otherwise.
If we assume the audience is all people who believe this is an issue, then this message makes sense. It’s trying to convince people that they should still care and not be nihilistic about it.