Construction of wooden ocean going vessels in the 1700's is much different that construction of modern ocean going vessels. The basic materials used (wood v. metal) mean vastly different methods are used. The similarities between the two methods owe more to the overall design commonalities than anything else. Point in case: welding; it's used today, but it wasn't 240 years ago.
Techniques have changed, but the one thread that remains is that it is built where access is easy for the workers. You don't see too many ships built in the middle of the ocean. Likewise, doing a scratch build from in zero G vacuum environment would be very difficult and probably take considerably more time and effort than one that has its hull sections built on earth and then is assembled in space. A space build would require a lot of EVAs and while times may change, human endurance doesn't.