Is it really necessary to send humans to those places just to get the knock-on benefits? Couldn’t we do those things directly, without going there?
It seems to me that, today, those who have the money to spend on these endeavors would only do so if there were perceived short-term benefits to themselves. That means they plan to exploit the resources, or increase their own power somehow.
I know the good engineers that make this happen are doing it for the challenge and in the pursuit of knowledge, and I know that’s why we poors support it, but that doesn’t “pay the bills.” What is the motivation behind the money? Why are they really doing this?
For the most part, the resources that we need to survive are renewable if we use them responsibly. And the things that aren’t renewable we can be quite economical about using and should last centuries if not millennia into the future, when hopefully we have better technology to give us alternatives.
We do not need to terraform the Sahara to save Earth. The point is that if you’re so gung-ho about terraforming things, how about you start with a smaller challenge that’s closer to supply lines and labor?
Going to Mars is just a bad plan, period. There’s nothing on Mars for us. Going to the Moon, fine, the low gravity and the Helium-3 and the short distance I can definitely see an argument being made for it. But Mars? There’s no reason whatsoever to go there.