If they did that, U.S. customers would be paying 10% less than they were 3.5 years ago, and Canadians would be paying 15% more than they did 3.5 years ago when the skates came out and when the dollars were at parity.
As it is now, you're paying the same price that you were 3.5 years ago for a skate whose model has been continuously upgraded over that time, and shipping is now free (and the price hasn't gone up due to inflation, either). And Canadians are also paying the same price they were 3.5 years ago but still have to pay shipping and GST. So what's the problem? You're sad because Canadians aren't paying 25% more than you? And you're now getting free shipping to boot!