You don’t have an ability to “erase it from their servers”. There is no way to be sure they actually delete anything when you erase it, they could just be hiding the access.
Speaking as someone who worked in a large company before (although perhaps not Google-sized), and several smaller ones, they are very motivated to reduce storage costs whenever possible. Sure they could be "just hiding the access" immediately after you request them to delete, but that storage will likely be overwritten soon by something else.
