Though as individuals we can both agree that it might make sense to leave, human communities behave differently. Your heritage, land and culture are very much part of who you are, sometimes the the only thing some people have. L'Aquila will be rebuilt, tougher and stronger and if there's another earthquake in ten or fifty years time, it'll be build it up again and again and again as has been done in the past and as long as there is a desire for a community to cling on to its roots.
By the way, there is no such thing as an earthquake free zone in Italy. 😀