This analysis is easily refuted in that your Japanese car isn't representative of builders buying the cheapest available 2x4 or screw and trying to deliver the cheapest built house with the most profit, and not really worrying about building a long-term brand.
That sounds like an argument FOR having prefab homes from a company like Sears that's trying to build a long-lasting brand. Maybe there is opportunity for a different kind of Apple Homepod.