the Weinersmiths aren’t anti-space. They aren’t even anti-space-settlement. Rather, they argue that the path to space-based scientific breakthroughs, exploration of our solar system, and a deeper understanding of our moral standing in a vast universe cannot start with space settlements.
Landing people on the Moon or Mars any time soon is a stunt – a very, very expensive stunt. These boondoggles aren’t just terribly risky (though they are – people who attempt space settlement are very likely to die horribly and after not very long), they come with price-tags that would pay for meaningful space science. For the price of a crewed return trip to Mars, you could put multiple robots onto every significant object in our solar system, and pilot an appreciable fleet of these robot explorers back to Earth with samples.
For the cost of a tiny, fraught, lethal Moon-base, we could create hundreds of experiments in creating efficient, long-term, closed biospheres for human life.
Dave5 
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