Similarly, NASA is geared up for yesterday's space race. We have to send a man to space! We have to send two men to space! We have to send a man to the moon! Uh, now what... We have to send a man to MARS!
Well, no, we really don't. Yes, we could. We know we could. We wouldn't learn anything significant by doing so that we couldn't learn for much cheaper here on Earth. It would be a massively expensive, complicated and dangerous tourist expedition-- a lot like sending soldiers to the Middle East, actually.
We all already live in space, on the largest, safest, most self-sustaining spaceship any of us can conceive of. The future of space exploration lies in the hands of semi- and fully-autonomous machines. There's no good reason for people to be in space, not for the foreseeable future at least.