Don't know why either. I'm from the English part of Canada and can't stand the BS government formed by the British. I think the Senate should be abolished. One the one bright side, if the Queen dies, then Chuck becomes king. With those big ears, he might get shot by mistake as a moose.
One Canadian discussed the Crown with me and his reasoning was that with a big powerful Southern neighbour it helps to keep these links rather than end up as lookalike Americans.