You're certainly not alone in wrestling with issues of culture.
There are many ways to deal with the cultural issues. Concentration isn't necessary to have good promotion of national culture and national news and information flow, but it's one way to do it, and it has done it. The problem is that it has a lot of downsides, because after a while, if you're heavily concentrating, you stop investing very much.
One of the problems is that Canada has always been so afraid of American media and culture, with good reason, and it's so afraid of English, with good reason, in Quebec and otherwise, that it has allowed concentration, even saying, okay, well, at least it's not these others. The problem is that it should have undertaken mechanisms to ensure that more Canadian companies were involved, rather than fewer Canadian companies. It has done very well in broadcasting with Canadian content laws, and in other such things, they have done quite well.
You're not alone in this. Take the position of Ireland, which struggles dramatically because it gets hit from both sides of the Atlantic. It gets hit with English from the U.K. The Irish Republic is not too comfortable with that, for a variety of political reasons. It gets hit with everything from the U.S. and some from Canada, so it really has trouble being Irish. There are other countries that wrestle with these problems, including Austria, with the Germans, and it is important to deal with them, but concentration is not necessary to do it.
There are a lot of cultural policies that can be used and a lot of media-specific policies that can be used to ensure that you have adequate cultural production domestically.