Your response is interesting because it mirrors the attitude described in the article. Space travel advocates are so enamored with the idea that they're dismissive of practical realities. We're just supposed to try regardless as if reality will make way by sheer will. The measured physical and cognitive decline of living in a non-Earth environment for prolonged periods of time? The effects of radiation exposure on childbirth? Bah, the ambition to achieve the impossible conquers all!