every Korean should watch and internalize this

It's not as though Koreans are uncreative or incapable of thinking outside the box. All you need to do is look at the field of robotics, where South Korea is a global innovator, to see just what Koreans are capable of. But the people in that field are, sad to say, the exception, not the rule: most Koreans go through an education system that encourages memorization over actual thinking, converging on one correct answer over understanding that different angles of approach can yield multiple correct answers. Life isn't a multiple-choice test, but that's the sort of existence that Korean education prepares Koreans for. Making higher-level cognition a value ought to be a national priority, but the problem is that such revalorization will require fundamental changes in the culture, and that's not happening any time soon.