Well considering the length of time the Star Wars Galaxy has had FTL travel, the weapons, the medical sciences, and if one would look at the timeline in says Wookieepedia.com you could see a good breakdown of space travel. I mean much of the Galaxy has had Galactic Integration for many millenia, i.e., 200,000 BBY time line setting for Coruscant becoming Galactic City.
Three thousand years in that amount of time is really not much.
The thing I find that makes me sad, is how backwards and savage our own advancement is compared to that displayed if we even have issues with moon missions. But given us if we had a million years as a species to evolve things could interesting.
This also is not denoting science and the debates on FTL travel as well, with what we know, it doesn't seem possible. But because we can't do it, doesnt mean it doesnt exist and the term I am sure many have heard before, "We don't know what we don't know." All I can say is that one day I hope we do know and we can advance into that kind of Golden Age of Galactic travel.