For one, you don‘t need academics to build houses.
It‘s an idea of the 20th century that you would.
Previously architecture schools were part of the art departments. A bit of engineering, maybe, but that‘s it.
Now that you have academics, they need to be innovative.
The old doesn‘t count. Architecture becomes like fashion. Students are scolded if they want to produce anything traditional.
This is true for 99% of architecture schools worldwide. Notre Dame is a noticeable exception, as are several summer schools in Europe (by INTbau for example).
There is zero reason for neglecting or denying traditional architecture. The Romans have already known how to live well. Without artificial air condition. Perfectly climate adapted. Natural materials.
Second, architecture schools are not about education, it‘s about becoming part of a cult. It‘s about telling a story, about winning competitions, and about convincing investors. Not so much pleasing the users of a building.