I've worked in traditional construction and the plans are never accurate with hundreds of omissions/errors/interferences. Those can be corrected in real time when something is field built, but are nearly impossible when the house ships wrong but nearly finished.
I can see it working with cookie cutter housing - first ~5 will be garbage as they find bugs then slap a thousand identical copies up cheaply. For custom it's a mess.
The buildings also look horrendous by default, artificial and cheap looking with a complete lack of character. I’m all for prefab in theory but it’s like building a whole piece of software without testing any of the interfaces fit together or that say logging and error handling are plumbed in without testing them. It’s clearly a recipe for disaster even with the best organised prefabricator.
I have been to a Bone Structure presentation. They fabricate all parts and interfaces using computer operated cutters with extreme precision from CAD plans. Note that parts are made of metal, not wood.
The structure is then aligns perfectly and all connection holes align perfectly as well.
The building is then assembled using just an electric screw driver, on sight. They claimed that almost anyone could do it, like IKEA. But they still require skilled technicians. But the point was that it isn’t a rocket science and plans are designed in such a way that you can’t really mess it up too much.