There's another aspect. If you're launching men in rockets, you cannot tolerate failures, so the development cost is way, way higher. The cost effective method is to launch unmanned ones, tolerating a lot of failures, and when the bugs are worked out then launch men.
replyIf you always fail, you aren’t trying.
replyIf you never fail, you aren’t trying.
If you always fail, you aren’t learning
replyIsn't that better?
True, but then you have to differentiate trying and failing vs not doing anything and failing by default.
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