Many hate him for his decision, and I completely understand that. But he also had no memory after the surgery, which is what he was told. So she would have come with him, a 50/50 chance that he'd even survive, then two years alone because of the coma, then alone again with the statement "who are you?" He didn't know what would happen beforehand; he could have functioned without complications, but do you want to do that to her? He decided against it because he knew what could happen. He made the selfish decision to break her heart and then maybe live happily in Korea. The uncertainty at least offered a chance for her happiness, so he took it. I don't think there's a real yes or no here; both would be good and bad. But when you're in the situation yourself, you make a decision based on your feelings and your knowledge. Without knowing the future. What would be right or wrong? Who knows?
Many hate him for his decision, and I completely understand that. But he also had no memory after the surgery, which is what he was told. So she would have come with him, a 50/50 chance that he'd even survive, then two years alone because of the coma, then alone again with the statement "who are you?" He didn't know what would happen beforehand; he could have functioned without complications, but do you want to do that to her? He decided against it because he knew what could happen. He made the selfish decision to break her heart and then maybe live happily in Korea. The uncertainty at least offered a chance for her happiness, so he took it. I don't think there's a real yes or no here; both would be good and bad. But when you're in the situation yourself, you make a decision based on your feelings and your knowledge. Without knowing the future. What would be right or wrong? Who knows?