The point is that a shipyard could also be run by a number of smaller companies, each doing part of the job, if only they can collaborate effectively. Capital and manpower can be divided between firms.
There is one problem with a y-combinator approach to capital intensive work: someone has to be in charge. There is 'a' party responsible for delivering the product to the customer, and that drives everything else.
Put ycombinator in charge of a shipyard and a lot of cool stuff will happen, but delivering a finished boat on time and on-cost is not one of them.