Sorry - Beer is our "Beverage of Choice"? Pretty sure we drink more tea than beer and more coffee than tea... and more than either that sweet sweet water.
I don't even particularly associate Canadian culture with beer, we make some darn fine ones but Cider tends to dominate our alcohol culture (or maybe Fireball).
"Ciders, coolers, and other refreshment beverages" account for only around 10% of the market share, behind beer, wine, and spirits, so I'm not sure where you get the idea that cider is the most popular alcoholic drink.
Unpopular opinion - good.
It's a known carcinogen. Add onto that the social issues it can cause and I think it makes some sense to tax it more that other things to bring in those external costs that were being "passed on" to society in the form of healthcare and social services.