Our society is able to take flights all the time, has year-round availability of seasonal fruit, has gargantuan industrial processes treating millions of sentie

Our society is able to take flights all the time, has year-round availability of seasonal fruit, has gargantuan industrial processes treating millions of sentient beings like inanimate product to supply meat, etc. Obviously these things aren't sustainable, given that their structures are so closely intertwined with fossil fuel usage, yet it would be basically impossible to convince everyone on Earth to stop using making use of them, which is why I suppose I agree with the "pessimistic" view that the author has. Regardless, mitigating a disaster while still causing that disaster doesn't result in the disaster ending. If we allocate all our efforts into mitigation we won't be in a position to actually restructure our society to be sustainable when the problem of climate change remains.