President Lee Jae Myung is a remarkably busy man. He uploads social media posts late into the night and constantly issues his instructions to his ministers at the Cabinet meetings livestreamed every Tuesday. Lee has been in office for less than a year and a half, yet it already feels like he has been president much longer. Every day he comes up with something new that his ruling party then scrambles to defend. Rarely has a government made so much noise — so why is life getting harder for ordinary Koreans? Despite all this activity, there is little to show for it. Hard work is no virtue in itself. What matters is what you do and why. For someone too sure of his own judgment and unwilling to face inconvenient facts, diligence can become dangerous. When that person is a president, the entire country may suffer. The real danger lies in confusing what serves him politically with what serves the country. Urgent problems go unresolved while the president remains busy touting his own achievements. Consider the stock market. Lee has spoken openly about his own experience as a stock investor.