Canada will do much better joining US (and distancing itself from declining EU and its disastrous policies). The US is much better managed; the results speak for themselves.
"The point" of Canada is that it's a separate country that doesn't have US politics. That being said, the general lockdown of the boarder after 9-11 has driven a lot of people who live close to the boarder nuts. Crossing the boarder used to be like crossing a state/province boarder. If you look at satellite photos of the boarder around Maine, NH, and VT, it's full of little country roads where you could cross unimped…
Perhaps because it’s like the weather; something massive and powerful that could crush you at any time but you can’t change it.