You own that physical copy due to the physical nature of it. However, you still are limited in what you can do with it. You can't make a copy of it and sell that copy. You can't read that book aloud, and sell the recording. In certain cases, you can't even read that book for an audience. The fact that you own it has embrued certain rights to you due to the physical nature of the book.

Take away the physical medium and there is nothing physical left that you own. Therefore, you have no physical rights to it anymore. The publisher, at their sole discretion, can remove the medium of access by which you consume the book. And then you'll be left without a book.

This is exactly how the current system works, I am just explaining it to you. So don't shout at the wind.

Let me stop you right there: no one is claiming that buying a book gives you copyrights to its content. That's a strawman.

When you own a book, you own that copy of it. You can do whatever you like with that copy, short of distributing copies of it. You can sell it. You can lend it to friends. You can leave it laying around a doctor's office for a stream of people to read. Short of distributing copies of it, it's yours.

Sony claims you do not own your copy of a game, merely the right to use it until they decide otherwise. That is fundamentally different than when buying a book, or CD, or DVD.