In the comment you're replying to, I was thinking of the "architect" being basically replaced by a software package that designs the whole house based on the required criteria. Any aesthetic judgments are encoded in the software's heuristics, and the range of available styles are basically part of the brand of the company responsible for this house-designing-and-building service.

Allowing people to directly design their own house using CAD software is also an option. I think on average it would turn out okay most of the time. People have a pretty good incentive to design the spaces they live in well for they way they intend to use them.