Even so, it's still worth _trying_ to fix it, or barring that, to try to save as many billions from a horrible death as possible.
The approach taken by Dark Mountain is a little better I think - they don't focus on false hopes, but a literary response to the catastrophe (apocalypse might be a better word) on the horizon and how to deal with it on a human level.
We're all doomed, after all, by dint of our mortality (or our sun's, barring that). Moments of joy can still be had.