To use the wood, the boat maker will need to sand the wood so that the surface is smooth. Unlike the traditional technique, nowadays, boat makers use modern technology to save time. I believe back then, it was done manually using a manual sander. That itself can be a time-consuming exercise.
When I was there, he sanded almost 10 pieces of wood. I believe that it will take him more than 10 times the time AND energy if he were to use a manual sander.