Happy April Fools Day!
Everything I've previously said in this thread was complete bullshit (hence Baruch's glowing review, lol).
Almost all of my arguments were either false dilemmas (funding Social Security VS funding NASA), irrelevant (Christopher Columbus did terrible things as an argument against exploring the Earth), or predicated on horrendously wrong assumptions (NASA employees cynically exploiting climate change for money, space exploration as wasteful, grossly misunderstanding the value of spinoff technologies).
One tragically common bad argument is that we should fix problems on Earth first before venturing out into space. On the surface, that sounds reasonable, but when exactly do you guys think all our problems will be solved? It's never going to happen. So, by agreeing with that argument, you're effectively agreeing to never explore space. What else could I get you to give up by forcing you to choose between two things?
Anyone who thought any of these arguments were compelling in any way, you need to seriously re-examine your baloney detection kit.