tldr: the left hates the right, and vice versa.
So wouldn't everyone be happier living along side those who align with their political views?
Not a hard question, and I think it would make peoples' lives easier on both sides of the political spectrum.
Easy. They'd finally get their utopia (ontario quebec and the maritimes. ewwww) and immediately begin infighting over important issues like pronouns, class divides, and whatnot. Self destruction within a year.
Meanwhile, Popcorn eating in the West as within 4 years of expelling progressive ideology we invent real quantum computing, anti-gravity, warp drives, and cold fusion. We build giant space stations, start moon and asteroid mining, and watch the world burn.