What would not work? Give a specific example. The app has access to its own state data regardless. If it needs permanent access to one of my folders where I maintain my data, all it has to do is ask once.

Yes, but then you quit the app. How is it going to read that folder again?

It simply reads it. That is the whole point of explicit permission.

Is that not what happened here?

No. Implicit permissions are not requested by the app, and cannot be removed.