Risk is not only an estimate of the extent of harm if something happens but the likelihood of it happening, hence they're not prepping for Doomsday - which wou

Risk is not only an estimate of the extent of harm if something happens but the likelihood of it happening, hence they're not prepping for Doomsday - which would be fairly pointless - but worse case scenario, of which there are several vying for the title of worst case, each with varying chance. I'd rather liken it to fastening my seatbelt than prepping for Doomsday.