The way I see it, there are two goals to human space travels.
The first, very distant one, is to seed ourselves among the stars to avoid being erased from existence by anything that would threaten our existence on earth, from man made cataclysm to natural event.
The second, with much more immediate result on a human scale, is that every time we face such a challenge it's only an opportunity for us to develop a new technology. Eg sure lower gravity will be an issue, until we figure out how to regulate gravity on a ship / base. That might seem far fetched but just looking at the tech invented to put human on the moon how many of those were far fetched beforehand ? Give people a challenge for tomorrow and watch them work at solving it.
The first, very distant one, is to seed ourselves among the stars to avoid being erased from existence by anything that would threaten our existence on earth, from man made cataclysm to natural event.
The second, with much more immediate result on a human scale, is that every time we face such a challenge it's only an opportunity for us to develop a new technology. Eg sure lower gravity will be an issue, until we figure out how to regulate gravity on a ship / base. That might seem far fetched but just looking at the tech invented to put human on the moon how many of those were far fetched beforehand ? Give people a challenge for tomorrow and watch them work at solving it.