It's harder to imagine plans to actually use anything we find out there without some manned component, barring a dramatic improvement in artificial intelligence.  Even if it's just a handful of people at some intermediate point, we're still sufficiently smarter than any machine in existence that any sort of large scale operation would likely benefit from having some people closer than 40 minutes or an hour away, via radio.

Besides, we can't start living in space or on other planets without practicing, and we don't do that with robots.

Many don't consider these even vaguely realistic goals, and maybe they aren't.  Many don't think them even particularly desirable, and maybe they aren't. Oh well.