any analogy to real-world property theft fails because in digital piracy there is nothing being taken out from control of the owner
in physical theft, the owner loses out on the money from the sale (assuming you steal from a store, and assuming you would otherwise buy the product) AND the item itself. they can't sell the same shirt you stole because you physically control it, there's no matter duplicator ray or something involved here.
in digital piracy, the owner loses out on the money from the sale (again, assuming you would buy it otherwise. given that the original conversation involved pirating a game you already purchased from them, I'm guessing you wouldn't buy it again, so in this case the owner is not losing said sale money) but does NOT lose the product. They can sell it again and again and again, as long as they retain a master template with which to create a copy to give to any purchaser.
and it's easier to say that the owner loses money from the theft of a physical object than it is from the piracy of a digital product, because they can't sell that shirt to someone else after the theft. with digital products there is no moral obligation for you to purchase the product (as opposed to simply not acquiring the product at all), so it's a little iffy to say they "lose money" based on them not selling it to you, whether you go on to pirate it or not. (and there also is no moral obligation to purchase with physical products, but at least with physical products you still have the object which has some intrinsic value. you can actually use the object for something else, or sell it to someone else if you miss a sale and haven't been stolen from)
to say that piracy from previous ownership is like buying a shirt and then stealing a new one once the old shirt has been rendered unusable (by the owner, in this analogy) fails because you're not taking a second physical object that they can't sell. it's more like re-creating the design of the shirt after losing it, so that you have a second copy of the shirt and the original owners retain the same number of shirts to sell (3D printers for example, though you wouldn't print a shirt because it's kind of hard to do that with woven fabric, or photo-shop and silk-screening a different shirt with the same design, to name some real-world ways you would actually do this)