He's definitely talking about why it's been so long since we've had another manned mission to the moon. My money is on the fact that it is so expensive and that the scientific returns are just not great enough to warrant that amount of investment, and that robotic exploration is a much more viable option until we can make space more accessible. What I want to know is why on earth (or on the moon for that matter) haven't we had a robotic rover up there when we've already had a bunch go to mars...get a damn nuclear powered brute on the surface drilling for useful minerals or measuring the availability of helium-3, go private sector lolol