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.
This is why you don’t substitute social media for primary sources if you want to learn anything.
Ships and planes ARE NOT the biggest CO2 emitters. Random big corporations ARE NOT the biggest CO2 emitters.
Transport (I.e driving your car) and energy (I.e. running the AC) are the biggest CO2 polluters by far, with over 50% of emissions from those 2 sectors.
Everyone can make a difference very easily by driving less and using less power…with the happy side effect of sticking it to the corporations you say are the biggest polluters.
Because - no surprise - the biggest corporate polluters are almost all oil and energy companies.