"But attack can take strange forms. And you will remember the tooth. The tooth. Duke Leto Atreides. You will remember the tooth." -Dr.Yueh - Frank Herbert

If you ask "Should we be in space?" you ask a nonsense question. We are in space. We will be in space.

Full moon calls thee — Shai-hulud shall thou see;
Red the night, dusky sky,
Bloody death didst thou die.
We pray to a moon: she is round — Luck with us will then abound,
What we seek for shall be found
In the land of solid ground.

This is the age of the shrug. He knows I've heard all of the stories about him and he doesn't care. Our civilization could well die of indifference within it before succumbing to external attack.