No, with the Big Dig the money is falling off and hitting them on the head!
But seriously - should we then stop building/abandon those parts of the country that will, undoubtly, be hit with a major earthquake in the next 100 years? Or how about other parts of the country that flood? I've had to deal with three rounds of tornadoes here - including one that hit my property. Let's get people out of Tornado Alley! And you'd be surprised at the number of areas around the country where scientists tell us it is only a question of when, not if, they will be hit with an earthquake. Check out the data on the east coast.
Following your logic, the vast majority of the U.S. would have to be abandoned. I agree that there are sections of New Orleans which should not be rebuilt - sensitivity of certain groups be damned - but we need to build smart. There is no reason that New Orleans has to flood again. It is not a given - not a certainty. Throwing up our collective hands and saying "No way" is not the answer.
And I happen to think that heritage and history are important. We are well on our way to being a country of soul-less homogenized strip centers.