Is it purely that this robot never takes vacation and never asks for a raise? Feels a lot like this permits building a home largely without human labor, which I'm sure the VC class would be very excited about.
This only helps with the framing and cladding. You still need all the labor for interior finishings, plumbing, electrical, HVAC, roofing, foundation, and site prep. That’s 80%+ of the cost. Assuming the 3D printed walls are even cheaper than wood frame, which is doubtful.