That all sounds great and your argument has merit, but the debt isn’t the only issue. This country is currently becoming occupied by foreign invader, the terrorism threat grows daily, and its present political trajectory is one toward fragmentation and national obliteration. That should be a far more urgent concern than the infinitesimally minute chance of being struck by an asteroid.
Like you said.. nothing is a higher priority than survival.. and rolling the dice on a moon village venture for a tiny, UN-chosen part of the world’s population belongs in the realm of fantasy.
And again, what does it matter if we solve those problems just to go extinct. It is NOT an infinitesimally minute chance of being struck by an asteroid, is an INEVITABILITY. It has happened multiple times before, it WILL happen again. The only question is does the asteroid hit before or after the next ice age (which is actually the norm for the planet)? Before or after the next polar reversal (which happen every couple million years)? Before or after the next atmosphere destroying solar storm (again, happens fairly often on the cosmic scale)? Before or after the sun runs out of juice (happens to all of them eventually)?
If we solve every single problem we face EXCEPT getting off the rock we didn’t solve anything.