I think that enabling export of test runs via API can be very beneficial. Here’s the use case.
In my company, we decided to create a manual test procedure in which the entire engineering team will participate in exploring the entire application.
Many test cases were created in multiple test suites, all in a single project.
I automated a few parts of the process - generating test runs from all test suites using UI script/TR API and submitting them back from excel using Google sheets gs.
The missing link is the ability to export the test runs to excel. This I still need to do manually.