No, I want a web framework that is just a web framework. The web is just an entrypoint to an application, like a CLI or GUI. If you use something like Flask or Pyramid this is exactly what you get. They are roughly analogous to something like Qt. Something that sits at the edge of an application converting low-level user input into high-level commands and events etc.

You could use Django like this, but you'd end up manually mapping between Django models and high-level domain models. But this mapping is exactly what an ORM like SQLAlchemy does! It seems crazy to do it yourself. So nobody does. They build fat models with all the business logic right next to application logic like foreign keys etc.

Even if you did try to do something different developers would complain that it's no longer a "Django project". Have you ever seen any Django project do business logic completely independently of application logic?