[dimitrios1]

I encourage you to watch some videos online of traditional (mostly hand-tools) Shipwrights. Even with the use of a bandsaw to do the rough milling, it is an arduous and lengthy process. Shipwrights also work with some of the longest planks of wood any form of woodworking does. In the days before machines, there would be scores of workers simply preparing the wood and getting it ready for the ship building.

My hunch would be the reason shipbuilding is faster is it is easier to scale to multiple workers, and there are parts you can do in parallel.