First of all, the US doesn't understand Canadian culture, so why would it be any different.
Second, there is a lot of English content (and French) from other parts of the world.
Third, there is this amazing new invention called subtitles, you should check it out.
And fourth, if they would sell us their "culture", there are plenty of illegal IP TV providers that would be more than happy to take up the slack, not to mention outright piracy.