He's not saying this is all fine and dandy, hes saying its not an apocalypse, just a global catastrophe from which both the earth and humanity will recover.
"It is based on a recognition of the astonishing beauty of things and their living wholeness, and on a rational acceptance of the fact that mankind is neither central nor important in the universe; our vices and blazing crimes are as insignificant as our happiness. […] Turn outward from each other, so far as need and kindness permit, to the vast life and inexhaustible beauty beyond humanity. This is not a slight matter, but an essential condition of freedom, and of moral and vital sanity.’
[1] http://dark-mountain.net/stories/books/book-1/the-falling-ye...