The Voyagers are just the beginning.
We can't see it yet, stuck as we are, in the present moment, filled with strife, failure, and disappointment. But the years and centuries to come will see us colonize the solar system, bringing new opportunities for millions, while easing the drain on Earth's ecosystem.
How can I be so sure? Because in the long arc of history that is what we've always done. We went from Africa to Asia to Europe and all the way to the Americas, founding cities and developing technology every step of the way. We launched into the Pacific, exploring island after island, eventually finding a new world in Australia. We have outposts on Antarctica and in low-Earth orbit. And I'm certain that, this decade, humans (Americans, Chinese, or both) will once again walk on the moon.
The people who launched the Voyagers believed that the future would come--they built a machine that would last for decades, knowing that people would benefit from its discoveries. Without that belief, they would have never tried it.
That's my lesson from the Voyagers: we have to believe the future will be better than the past, so that we can build that future. That what we've always done. We are all voyagers, and always have been.
I share the sentiment but it seems a bit like imposing a human narrative on a Universe that does not seem to care all that much about us. Maybe we really are stuck in the Solar System and space is just too vast to do much about it.
That colonization was primarily driven by the need to obtain resources. Today and in the future, there is no reason to should send humans to gather resources when we can send robots to do it instead.
Past colonization happened because individuals made choices they felt would benefit them.
Even if the only goal of colonization is getting resources (which I dispute), some individuals will risk colonization to get resources that they can't obtain at home. Resources are not evenly distributed across a population and, and every piece of land is owned by someone, but not everyone owns land.
The cost of space travel will continue to drop, and at some point it will make sense for people to seek their fortune there.
Moreover, we didn't land on the moon in 1969 to get resources, and we're not going to land in the 2020s for resources. The reasons are complex, and not always logical, but they are definitely not about resources. I don't see any reason why that would change in a hundred years.
There's plenty of resources to be extracted from space. Metals, for one. Also, zero-G drug development and manufacturing is promising too.