Following through your oppia quiz, it reminds me of interactive fiction. I could see one being used for the other here.

http://inform7.com/

https://blogs.bl.uk/english-and-drama/2020/04/writing-tools-...

In the exploration I linked, the only types of interaction offered to the learner were either ok/proceed, or 'answer this textual multiple choice question'. This may make it seem like Oppia doesn't do much more than software for interactive fiction.

BUT Oppia has lots of other interaction types: https://github.com/oppia/oppia/tree/develop/extensions/inter...

For example, you can input music notes: https://github.com/oppia/oppia/issues/4842

Or ask the learner to enter a fraction, or to sort some objects.

There are more similarity between things like Oppia and interactive fiction, I don't see them at odds. It is is wonderful that Oppia has a musical notation interface.

If you zoom out far enough, everything could be considered a quiz.

This will all be on the test.