Yes, the money could be better spent on Earth. But would it? Since when has money saved by government redlining been spent on education and cancer research? It is always squandered. Let's squander some on Mars. Let's go out and play.
Mary RoachHere is the secret to surviving one of these [airplane] crashes: Be male. In a 1970 Civil Aeromedical institute study of three crashes involving emergency evacuations, the most prominent factor influencing survival was gender (followed closely by proximity to exit). Adult males were by far the most likely to get out alive. Why? Presumably because they pushed everyone else out of the way.
Mary Roach