Sure, use piracy. We all understand what that means. But I'm not trying to define it out of existence, I'm trying to use the english language effectively. It's plainly not theft. And furthermore theres no such thing as intellectual property. Unfortunately you will never own any of your copyrightable creations. Your will just own a temporary monopoly on their reproduction in certain circumstances.
It's as simple as that. Thinking that you own any creative works is misunderstanding the law and society. Thinking that copying something is theft of it(or indirectly theft of anything else) is a misunderstanding of the same.
I don't really understand the difference you place between physical property, and intellectual property. My ownership of both is imposed by the government. Without government support, I am sure I would lose control of both my physical and intellectual property very quickly (unless, in both cases, I started shooting people who tried to take them).
You don't own "Intellectual Property". You own a temporary monopoly on its reproduction in certain circumstances. But the creative work itself you don't own. Sure, if you paint a painting, you own the physical canvas, paint, and wood frame. Those are your property. But the depicted image? You don't own that. You own its copyright. Which is that temporary monopoly I described before.
It's as simple as that. Thinking that you own any creative works is misunderstanding the law and society. Thinking that copying something is theft of it(or indirectly theft of anything else) is a misunderstanding of the same.