Yes, yes, just as Neil Armstrong and Harrison Schmidt returned to Earth. But with any luck, there are people who are alive today who will help to settle the Moon - and die there of old age. Humanity must either continue out to the other planets, and to the planets of other stars, or our race will die here in the cradle of Earth the next time a BIG rock hits the Earth, we will become extinct. I'm a big believer in humanity not becoming extinct.
The ultimate "space exploration is immoral" argument boils down to one of two things. Either you're a coward, and think all humans should be cowards, or you hate humanity and APPROVE of the idea of human extinction. Because if we sit here long enough, it WILL happen. It's a statistical certainty.
The less-sane of the commenters here seem to think that we're about to blast off for Mars tomorrow. It's not going to happen; we don't have any rockets. We can't even send more Americans to the International Space Station, now that NASA has decided to cut off cooperation with the Russians. But by the time we _can_ go to Mars, we'll be ready to live there - for a long time. Will it be ten years? Thirty? Fifty? Hell, I'm astonished that we haven't even been back to the Moon in the last 40 years. We could be on Mars NOW, if we had wanted to, in 1980.
So, let's start NOW. It won't be easy, it won't be cheap, and it won't be entirely safe - but nothing worthwhile ever is. People died learning about electricity. Marie Curie died learning about radium. People died learning how to fly, and people died learning how to dive, and people die every day in learning how to drive. People will die learning how to build lunar habitats, and learning how to land on Mars, and how to build homes there. And a lot more people WON'T die, and we'll learn what we need to know to settle Mars, and to build starships.
And just as it has always done, the knowledge that we gain in doing these things and going those places will make life easier and safer for you cowards who stay behind.
I'm not saying that we should not be preparing such a mission. I am just saying that we should not send anyone on a one-way trip without careful consideration. Human beings are very fickle. Someone who wants that one way trip now may change their mind in two weeks. Besides, there may be resources on Mars that we want to bring back to Earth anyway, so it will become more economically feasible if we can send raw materials back to the Earth.