Netflix isn't really "online". Yes, it uses the internet as its transport layer. But it in all other respects is a closed content delivery platform, akin to a cable subscription but with the convenience of on-demand rather than traditionally scheduled broadcast TV.

The CBC has rightly identified this. They know that most people get Netflix by plugging a box into their TV, just as they used to with a cable box. The CBC is not proposing the regulation of the web, it's proposing regulation of a platform that is essentially cable delivered over a different pipe.

Edit: moreover, the content that is on Netflix isn't open like the web, it's closed content protected by regional distribution contracts.