Yes. Humanity has only been traveling to space for less than a century. And 80,000 years or so to Proxma is only if you rely on chemical rockets, but even just fission based propulsion can cut it down to under 10,000 years. And that's on the pessimistic side of things, it's quite possible we could reach other stars in under a millennia, or close to a century, with nuclear technology fairly close to what we have today.

The big thing holding us back is infrastructure and manufacturing in space that has the capacity to construct the likes of an interstellar vessel. For that to be possible, we need low cost, frequent transportation to orbit. And we're steadily moving towards that already. This century is likely going to be a transition period from spaceflight as a highly specialized and risky field, to a widespread place of work, still specialized and risky, but not as much as today.

But bottom line, I don't believe we'll be limited in the solar system, or on Earth. In any case, there's a lot we can do here. And it'll be quite some time before we exhaust everything, by which point, interstellar travel may be as difficult as putting together an interplanetary mission now.