This is wrong on so many levels. Even though I personally disagree with certain aspects of IP and copyright law, this is just flawed thinking and is a false equivalency. By your logic, a (presumedly english) book should not be copywritten simply because it uses the same alphabet and therefore at the core is the same content. However, this is not true. Sure, all data at it's core is just numbers, but that doesn't change the fact that it is the organization of these numbers that create something that isn't just numbers. Whether that be an mp3 file, or a movie, or a pdf file. You also mentioned that ownership of something digital is insane because it isn't physical, except it is. You have a hard drive, on that hard drive is the physical data. On a dvd, is a physical representation of data. On an SD card you have a physical representation of data. The servers you're accessing this site from have a physical representation of the data being transmitted to your screen, which also is a physical representation of the data being interpreted from bits to pixels to light. So theoretically one could use your logic to say that DVDs aren't physical, as they contain a string of ons and offs. Might I also remind you that binary is quite literally a representation of the flow of electricity in your computer, which is also a physical thing. You seem to imply data is somehow imaginary, when it is physical.
That being said I do feel like if you somehow, some way actually get charged or sued over copyright law for sharing a movie/game/album/whatever that you have bought the rights to (because that's essentially what you do when you buy media, you buy a personal viewing/listening license as well as a physical representation of the data), I do think that's dumb.
Anyways this just sounds like bait from an angry pirate who got a letter from Comcast telling him to stop downloading the latest episode of Game of Thrones from ThePirateBay.