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This "Send Robots Instead" nonsense is just that -- Nonsense. Mankind's Manifest Destiny may have nothing but an unmarked grave in your hearts,
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Your asserted conclusion does not make it so. We can, by leading with robots, learn much and learn it cheaply. We can then use it to eventually send humans AFTER we perfect doing the heavy lifting remotely.
Sending humans early on is an artifact of Cold War penis-waving coupled with the primitive technology of the times. Now, just as we are removing pilots from direct combat by using UAVs, we can remotely work in space. We need to improve robots much more than we need to rush prematurely to send tourists into space. Back in the days when people and wooden ships were expendable, using them to explore Earth made sense. Now, humans are a severe burden on tech development. Master space with robots, and we gain better robots we'll need anyway because space is hostile to humans.
Adventure? Fuck adventure. Pay a commercial outfit if you want to be entertained. This makes sense, because tourism is a powerful commercial incentive. Exploration is not, so leave that to NASA.
"May your future be limited only by your dreams." -- Christa McAuliffe