Many Anglo-Canadians - and probably some Francos too - look at the monarchy as a "let's not re-write the whole Constitution" option, at least nowadays. Something that Australia's republican movement has discovered, to the best of my knowledge, to be quite burdening.

They call it "pragmatical monarchism" or similar wording.

That being said, I am similarly amazed - but for quite different reasons - by Brits moving to Canada.