That way of building is not very fast when you have "intricate" details like rooms, windows and doors.

btw for some reason people like bricks, think they look good. So i think there is a market for it.

This is what you are looking for i would say, it is a robot that 3D prints houses with concrete. https://www.youtube.com/watch?v=SObzNdyRTBs

Personally i think the fastest way of building robust houses that look good without tons of human after work is with prebuilt segments.

I have literally seen a concrete base on a yard on my way to work in the morning and an actual house walking back home in the evening.