You probably came to this conclusion by watching Korean movies.
1. Characters in film and television works are generally selected, and there are dedicated people responsible for makeup and costumes. If you pay attention to the real people in the background of the photo, you will find that there are also ugly ones.
2. Koreans do have a tendency to have plastic surgery, but this is not exclusive to Koreans. This is true for both Chinese and foreign artists. Like the most famous American superstar Marilyn. Monroe had plastic surgery to redo her chin, and Jolin Tsai had her nose and cheeks reshaped.
3. Koreans wear very thick makeup. If you look carefully, you will notice. Coupled with the lighting, shooting angle, etc. during filming, and post-processing, it will naturally look good.
In short, as ordinary people, it is impossible for us to imagine celebrities. As long as we are neat, dress appropriately, behave appropriately, and be healthy, it is the most natural beauty.