Firstly, I think this argument is kind of moot given the fact that a lot of different provinces focus on different gameplay styles and have a lot of strengths in different positions.
For example, Quebec has been VERY well represented in the goaltending department. Jose Theodore, Martin Brodeur, and Roberto Luongo are pretty much staples for the Canadian National teams. Roy would have been as well, but his own problems stopped him from playing for his country(his excuse in 2002 was what, that he wanted to win a Cup?)
As for the QMJHL, yes, it is a very offensive minded league. It doesn't produce a LOT of players with good defensive qualities. Eric Desjardins, as someone else mentioned, is one of the last No. 1 calibre defenders from Quebec that I can think of off the top of my head. Bourque being another.
The fact is, look at Canadian teams as players by province, instead of all the other provinces vs Quebec. You'll see the ratio between the provinces isn't all that distant. Of course if you compare 1 province to a combined 9 others, it won't look too flattering for the Quebecois.
But then again, if that's the stubborn viewpoint you choose to endorse, that is your perogative.
~Canucklehead~