I think his point in this case is you own the physical item but not the information on it. If not then I could buy some musician’s cd then I could say “Now I own their music” and start selling copies of their cd, publishing it, stealing their rights to it, etc. I think we can all agree that would be bad.
It is bad enough having gamers online foaming at the mouth like you just stabbed their mom when you make a mistake in a group.