Facebook's Download-Your-Data Tool Is Incomplete
This is a semantics argument.  Facebook considers "your data" things you uploaded to Facebook intentionally.They do not consider "things people learned about you by watching you" or "things people said about you" your data, they consider it their (the watchers or speaker) data.It's not all that different from how photography laws work in different countries.  If someone takes a picture of you, is it their picture, or your picture?EDIT: Im in agreement this doesn't match up with GDPR.  Outside of Europe, facebook can treat "Your Data" differently, and the button can function differently in different places.