Because DRM never gets cracked on day one anyways. And because DRM totally stops you from using a screen recorder to save the content in a DRM-free format.

Maybe with something like video games it can net a few extra days of sales before torrents go online, but ripping music and video is so simple. In that case, DRM is just a joke that makes the executives and lawyers happy, wastes money and time developing, and can cause trouble for the consumer.