Stolen software via bit torrent is nothing like stealing an ipod case. Downloading intellectual property without paying costs apple the opportunity of selling you that item- no actual loss of inventory. Stealing a tangible item like an ipod case or boxed software from a shelf is actual loss of the cost to make that product. Two different things.
Well of course copyright infringement ≠ theft. However, the customer experience is what Apple is about. Security measures on software and security measures to prevent physical theft both often harm the customer experience. That was the parallel I was making