Re: Bad idea
Funny, the Olympic had in industrious career, four of the six space shuttles are now museum pieces, many other zeppelins kept going and we never had a problem with helium airships, 9/11 was a deliberate act (something no engineer can ever fully account), Apollo 13 got back to Earth safely and the project still got us to the moon around 6 times: several times WITH BAGGAGE. Sure, there have been missteps along the way, but that's why the adage: "No guts, no glory." Diving into the unknown has its risks, but man the rewards can be sweet. Unless you saying it was wrong for us to discover fire and leave the caves.
As for buildings, consider how much people flock to cities. They want to congregate. How do you achieve that on limited land space (that's why Manhattan is a poster child for this—they hit the problem early because they're on an ISLAND). The alternative is sprawl like Los Angeles with all the problems that come with a sprawl. Going up allows for denser cities which means lower travel times and less frustration and so on. And just how often do ALL the elevators in a skyscraper fail, except in a disaster (and in a disaster, location doesn't really matter much)?