My question to you is so what? Must EVERYTHING have IMMEDIATE value to be important? You sound like one of those people that say "History sucks, what does it matter? It does not GIVE me anything!" ALL knowledge has value.
I would also like to add that without some sort of space travel, the Human race is most assuredly doomed. If it was up to me, I would have already been mining the moon and sending teams to Mars... to make a PROFIT!!!
On a final note, the thought that science is a waste of money is what drove Bill Clinton to cancel my beloved Super-Collider. You see, the benefit wasn't IMMEDIATELY obvious to the powers that be. That is a very short-term and rigid outlook. We could have been doing great things right now, IMHO.