The scariest thing about Don’t Look Up is that as absurd as it is, it barely exaggerates. Much of our political elite are just as greedy and foolish, our media just as vapid, and our response to impending disaster exactly as mind-bogglingly irrational as in the movie.
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Because that's how US news would report it.
It was pretty strongly implied that it was sabotage, at least from how I interpreted it.