You are entitled to your subjective opinion of theft, but theft requires someone to steal or be a thief. Public information is public, and cannot be stolen. If you want to write a piece of software, keep it unreleased, and stick your little floppy disk in a safe or lockbox somewhere, this is your business. If someone steals this floppy disk, there is a theft.
The same goes for art of any kind. If a physical theft does not occur, it does not occur. A scan of a book, or download of music or software is information. If it is released public, it cannot be stolen. Public information, data, or knowledge cannot be stolen. However the medium on which information is stored can be stolen (a physical CD, DVD, floppy disk, a book taken from a store).
Just because the corporate-government system makes silly little rules backed by violent men in uniforms, doesn't mean that is the natural order of the universe.
I believe both versions of XP you are referring to are the same. The main versions of XP are Starter, Home, and Professional, (there are also media center editions, and a 64 bit version).
The position is woefully misguided. I recommend you take some time to re-evaluate your stance on theft.