Suppose it was possible to travel to Mars and survive on its surface. Even if no-one ever moves there permanently, I'm sure that many people would visit, just like people currently seek adventure in remote and inhospitable locations on Earth.

Maybe we'll even get a version of the show Alone that's set on Mars. "We dropped ten astronauts off in isolated locations on the Martian surface. Let's see who can survive the longest!" I'd tune in to that.