Yeah, I'm aware of that. That's why I mentioned in the end that Musk is of course free to pursue his ambitions - in the grand scheme of things money is spent on much more pointless things, so him investing in science and space exploration is surely a comparatively good investment of his money.
I believe the innovations that come from such grand challenges such as becoming interplanetary will help solve other problems we face as well. I'm thinking of new materials, processes and technologies that can be applied in multiple contexts.
