The copy itself is incidental. It's the medium by which the performance of the license is executed through, and if some form of it requires a Sony online service to exist and to work or respond in a certain way and tied to your specific account, to gain access to the meaningful parts of the work, that's what you own. You can sell the physical copy, but you're only selling the actual material and whatever pieces exist on the disk itself. Caveat emptor.

The fact that some of the material exists in a form that is close to and within your control is irrelevant. That's like saying you own a copy of Google because some of the javascript code that runs the frontend is cached in your web browser. You don't.

"You will own nothing and be happy." better get used to that and make your peace with it