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.
Honestly I think we should stop trying to stop climate change and start adapting to it.
Because at individual scale all actions to limit climate change are almost meaningless, whatever we do we will not see the consequences of it. On the other hand we can adapt to climate change at individual and community level.
Start planting trees in our community, build a way of life that does not require fossil fuel since we are running out of them, installing solar panels and improving home insulation to help during externe weather events, buy less products and focus on repairing them instead ...
All of that can directly improve our life, present and future, without relying on everyone doing their share
AND, as a side effect, all the action we do to prepare yourself to live in a post growth world are also great to reduce our CO2 emissions.