Ok, then what about a DVD? You could say the same thing of a car vs movie by giving them the $.1 for the DVD itself, not the content on it.
Regardless, it doesn't matter whether it's a physical good or digital. Both physical goods and digital goods require time and money to make. When you buy a Porsche, you're not just buying the materials. You're paying for the engineering of those materials. Just because the format of the final product isn't a physical good in terms of online piracy doesn't mean there was no effort put into it.
A DVD would still be (inefficient) digital distribution. Why would I pay for that either (in the, "Why would I buy that?" sense, not the "Why wouldn't I steal that?" sense)?
Regardless, it doesn't matter whether it's a physical good or digital. Both physical goods and digital goods require time and money to make. When you buy a Porsche, you're not just buying the materials. You're paying for the engineering of those materials. Just because the format of the final product isn't a physical good in terms of online piracy doesn't mean there was no effort put into it.