[FabHK]

Furthermore, by the way, theft typically destroys total value. If someone steals a wallet (or anything really), the amount he gets from fencing it is typically much smaller than the cost (including hassle, time spent, and potentially nostalgic value) to the original owner of replacing everything (if that’s possible at all).

Copyright infringement, by contrast, arguably creates value - instead of one person being able to see the movie, two can see it.