[amelius]

Yes, but that only gives me my own data. I might want to export events to a different platform, including which of my friends go to these events.

Also, I might want to read my friends' posts on a different client.

[joshuamorton]

That very quickly veers into territory that violates facebook's terms of service.

[Shish2k]

The “access your own data + your friends' data” API is exactly what Cambridge Analytica used to scrape everybody’s friends’ data