This setup does NOT help with serving our frontend app, but we're using React for that anyway and I'm not sure I'd want our frontend so tightly coupled to the backend.
The fact that Django is mature and extremely stable between versions is a huge selling point for us. I'm not interested in making sweeping changes to our backend just because someone invented a new paradigm that may or may not be helpful to our app (eg, GraphQL).
That said, rendering HTML templates server-side does feel pretty archaic these days. I think it would be great for Django to take a more API-centric approach for a default installation. I can imagine that anybody coming from the JS world would feel totally out of place in terms of how Django works out of the box.