It addresses the criticism of the article which (criticism) misses the forest behind the trees. I.e. Netflix deserves to be viewed as a threat indeed. Just for different reasons.
> It is nonsense, treating a user as a criminal is not a security threat. DRM is just encryption
It's really simple. Trust is a mutual relation. I.e. since DRM always views users as potential criminals, it's natural always to view DRM as potential malware (and thus a security threat).
Practice proves that point spectacularly, because DRM always has an overreaching unethical nature (since it's an overreaching preemptive policing which uses the logic of presumption of guilt). As the Sony exec voiced the core idea behind DRM:
> We will develop technology that transcends the individual user. We will firewall Napster at source - we will block it at your cable company. We will block it at your phone company. We will block it at your ISP. We will firewall it at your PC... These strategies are being aggressively pursued because there is simply too much at stake.