You have to wonder if the people living in North Korea would have been better off if the communists had taken the entire peninsula. Was North Korea devolving into the dystopian hermit kingdom it currently is inevitable without a hostile South Korea right at its border? (this is not a rhetorical question, I'm hardly an expert on Korea) Probably the people living in South Korea would have been a little worse off, but those living in North Korea would have been many, many times better off if unified communist Korea just evolved into a miniature version of China or something.
Well by this sort of reasoning, a Central Powers victory in World War I resulting in German domination of continental Europe would have been quite desirable without the Holocaust, World War 2. Soviet totalitarianism, and so forth. And East Germany never developed into a "Hermit Kingdom" despite being bordered by West Germany.