At the most basic level, genealogy is about events: birth, marriage, death. Our primary sources boil down to statements about what persons were involved, in what capacity, in what place, at what time. The only information we as genealogists add, consists of assertions that a person appearing in one event is the same as one appearing in another.
This can be done at present, as far as I can see, only by uploading an image of the document and tagging the persons on it. Where do we put the transcription? In a photo comment? In the biography of the main person? In the biography of everyone tagged? Who is the main person in the case of a wedding?
Our SA baptisms usually list witnesses (I've seen as many as eight) sometimes with important information like "widow of". Our death notices span three or four generations and may involve so many people that an extra page is needed. Must our tagged images be the only way to convey that information?