[colechristensen]

Yes, humans living on other celestial bodies is a goal in itself, expanding us beyond Earth and a few people in LEO.

Cities on the moon and Mars are a reasonable and achievable goal. There are resources which can much more easily be exploited with real people on premise, some people will want to live in different environments, there are opportunities for sport, entertainment, tourism, and plenty of industries which will be much more effective with skilled labor on site instead of meticulously planned missions which often fail and if they don't spend a whole bunch of effort overcomming the basics of operating.