Copyright is a government-granted monopoly but the monopoly is hard to enforce. It works because most people actually want to support the creators, not because DRM is effective or anything like that.
So you have the uncommon situation in which a monopoly (the copyright holder) is operating in parallel to a competitive black market for content distribution (pirates). And then the competitive market -- even though it has to operate underground and makes hardly any profit -- provides the better experience.
Lesson for anyone who thinks market consolidation doesn't lead to consumer harm.