Like with anything "cultural", this depends on who you ask. I'm Canadian I don't support any form of government interference in speech and "cultural" matters. I don't feel "dominated" by USA culture, and I live in a border city where it is common for people to live on one side and work on the other, where people have family on either side of the border etc. where our traditional media broadcast (tv and radio) are a mix of local and American.
This is just my personal opinion, of course... but if our "cultural industries" are so fragile that they can't compete with other artists across the border, then that is their own fault and it indicates that haven't earned the right to my attention. I don't base my choice on what media to absorb on superficial criteria like the country of origin. Especially in the age of the Internet where my choices are literally global.
The real cultural difference here, in my opinion, is constitutional. Such media regulations would likely be considered a violation of the First Amendment in the USA. The idea that we have regulatory bodies setting rules around what kinds of information we can be exposed and under what circumstances to is a violation of everything that I believe in and I will never vote for any politician that favours this sort of government overreach.
So while you're not necessarily wrong in your generalization about the "perspective of Canada" (depending on which Canadians you speak of), as an individual Canadian I say "speak for yourself."