You’d have a valid point if Comet Elenin weren’t about to destroy the Earth by causing earthquakes and Obamacare.
What about the rogue brown dwarf star that is heading our way and will cause the earth to flip over sideways, pointing the South Pole directly at the sun and causing the Antarctic ice to melt and flood the earth in Biblical proportions?
Of course, we’ll have to survive all that stuff so that the aliens can kill us after they land the comet on the Mall in Washington.
Cue the Slim Whitman.