Agreed. Also, steel production is something that industrialized countries have been doing for over 100 years. It isn't exactly high tech. It just requires lots of raw materials and lots of energy.

It would not take any special creativity (merely an act of will, which would certainly be present in wartime) for the US to scale its steel and other raw materials production incredibly quickly. Sure, there might be a lag time before all the new capacity comes online, but that would not be happening at SF housing approval rates, instead at Liberty Ship construction rates.