Humans are weird.
If there were a real Bruckheimer moment, and we were suddenly faced with an extinction level asteroid impact with little time to avert it, we would surely muster as much of our resources as we could to try to avoid certain doom, even if it cost hundreds of billions or trillions of dollars.
However, if that asteroid were 15 or 20 years away?
The bickering would continue right up until impact. A small but highly funded group of "astronomers" would assure us that the asteroid would miss the earth entirely.
And another group of "astronomers" would insist that there was no asteroid at all.
We're hard wired like Holtzman shields: the sudden, quick attack raises our defenses, while we the slow attack boils us like frogs.
I maintain hope that we'll avoid a catastrophe that causes us to have to muster our efforts, at least until we progress beyond having to ask how it will impact this quarter's profits.