Yeah, that sucks. But some issues:
1. Your analogy doesn't really make all that much sense, as is. Are the people downloading it buying it? Assuming they are...
2. How many of them would have bought it were there no other option? This is always the big question of piracy, and is never given a satisfactory answer from either side beyond "Whatever makes my argument better." If no one would have, then he's "losing" money that would have never been his either way.
3. Again, what's the practical solution here? You can't make piracy go away. You can't prosecute every pirate, you can't make it impossible, it's not gonna go away. Here's an illustrative anecdote about unavoidable loss of product: Guy I know used to be a truck driver, and would deliver products to stores. He was told before he started, "Don't mess with the homeless people, just wait for them leave and deliver what's left." Sure enough, in certain areas, as soon as the truck stopped, groups of homeless people would show up and walk off with a bunch of merchandise. Did the people being stolen from try to moralize with them? Did they have cops show up and arrest everybody? No. They acknowledged that shit was gonna get stolen, and just factored it into their finances as an unavoidable loss.