True, but it's going to be hard to convince a small group of people to live a miserable, unrewarding live in an unforgiving desert in the off-chance humanity ends in sudden catastrophe.
Uh, no, it's not. There are a great number of people who say they would be willing to live on mars under those conditions basically just for the novelty of it. There are a great number of challenges with colonizing mars. Getting a small group of competent people is not one of them.