And don't forget the LIVES our system wastes...
The missing element in your "analysis" is the fact that WHATEVER we manufacture, it must be done using actual RESOURCES mined, grown, or put together by us, here on Earth.
Money IS a collective fantasy, true; and its also true that various tricks can generate more money and "economic activity" out of simple traded information.
BUT...
To DO anything with that money, we still need resources.
So while we are blithely using (up) the resources of the planet, in order to send some few privileged humans out into the solar system, the REST OF US, here on the formerly pristine planet that gave us birth, will be sinking deeper and deeper into a stew of that project's waste products.
How much is it worth, to follow our immature dreams? No one actually COUNTS in a dream -- not beyond three, anyway. By the time a thousand people have gone up the beanstalk to a "better" life in space or on other planets, the bill that comes due for that collective endeavor will have cost the rest of us litterally trilliooo,ooo,ooo,ooons of dollars, and probably millions of lives, in the final analysis.
And without the indefinite continuation of such a benighted policy, the effort will still evaporate into stardust, when the support is withdrawn.
