All I want is a clear answer from someone at facebook. Why can't I choose to delete data about me from your database? I don't even nec need to be able to see it

All I want is a clear answer from someone at facebook. Why can't I choose to delete data about me from your database? I don't even nec need to be able to see it or do it at a granular level, though that would be nice. All I want to be able to do is say delete this. Can I delete a private message from your database? Can I delete your record of a status I wrote from your database? Can I delete access logs from a website that was using a FB pixel from your database?