I don’t know what your attitude is about, but while prefab homes are done the world over, in the west they are often the poorest parts of society forced to live there due to no other options.
Culturally, this seems to be quite different.
There are many German and Dutch companies that make high-end pre-fabricated houses and walls that sell not only locally, but abroad.
Many factors contribute to the purchasing decisions of quality pre-fabricated housing materials, of which price is only one (and probably isn't even a factor at the high-end).