Imagine use case where there is app with set of documents shared between multiple users and there is document governance in place.
With current api app would need permission of two users to change owner of document, this mean app would need app-only permission to whole onedrive and this isn't good from security perspective and maintenance perspective(when users leaving company as just one of example)

An organization scoped special app folder would solve problems and would give a centralized way to manage access, and help users collaborate