re: classic bad arguments
I agree that we won't stay on this planet for the next 100 years no matter what Nasa does, but to me the question is whether the US government should continue throwing money at manned spaceflight.
I thought that most of the regulatory hurdles for private spaceflight in the US had been removed. I also vaguely recall that a failed space launch in Brazil killed a bunch of people. Aside from reasonable protections for innocent people on the ground, government should stay out of the way of private manned space efforts.