The problem of someone taking copyrighted content and making it available for others is a small one. The big problem is the many millions of people who take advantage of it. If everyone recognized that they're not entitled to anything except their basic human rights, none of which have anything to do with access to MP3s, then others posting that content online wouldn't matter.
The hope with this article was a little empathy from a community that often leans toward not caring about copyright law as it pertains to music. While many chose to go the route of poking tiny holes in parts of the analogy, plenty didn't realize it was an allegory and talked about how messed up it was. Many of them the same people who fight music copyright tooth and nail.
It's just sad to think that everybody enjoys music, just like they enjoy software, and so many other things that can be easily taken, and yet don't care if the people who create it see enough benefit to keep making it for them. It's short sighted and will result in fewer people having the time to become experts in these crafts, which is a loss for everyone. Sure, quantity is at an all time high, but in art that hardly matters.