This is a technical solution to a political problem. The cost of building housing isn't the problem. As the article complains, the problem is housing is an investment and as other commenters have pointed out, our government has pretty much protected this asset class and all of America has the expectation that pricing will continue to go up.

If you flood the market with competitive homes you will destroy housing at an asset class; people understand this so they will block any technological improvement that would make housing cheaper.