We don't progress the species with digging up more rocks, building more stuff, selling more stuff, or dare I say it, finding a new way to get a cab.
A few more vastly wealthy eccentrics building teams to play with space, fusion (carefully I hope), generation, or whatever pipe dream they have could easily make up for some of the global short termism.
Does it matter if he sells enough tickets to Mars to profit? I doubt it. I don't think that's the point. The moon landings were excellent for helping humankind dream big, Mars will be too.
What will the moon landing conspiracy theorists do then? :)