Wanting to get out of a place after a major earthquake is a little like closing the barn door after the cows have already escaped. The damage is already done, and you might come off as a little selfish because finding good accommodations might be difficult, or you don't want to be around while everyone else tries to pick up the pieces.
If, however, there are still major aftershocks going on, I can totally see why one might want to leave when one could, especially if it is going to affect air travel.