Why is there always a serial killer in Korean suspense dramas? What social phenomenon is reflected?

Speaking of Korean dramas, I believe everyone thinks of sweet love dramas, but there are also many suspense dramas in Korean dramas, and many excellent works reflect social phenomena more or less. So why are there more or less elements of murder and disappearance in the sweet love of Korean dramas?

First of all, these plots can enrich the love life of the hero and heroine. In other words, this ups and downs of the plot can make the hero and heroine's character look fuller and attract the attention of the audience. For example, there are some illusions about reality in the world where women obey W, but the dark side truly reflects social life.

Second, there are many Korean dramas that allude to real life. I have to say that many plots are indeed very clever and profoundly expose social problems. Many unsolved problems in life, even some hidden rules, are deeply reflected in the play. The Druna Hotel, which is on fire recently, is such a play. Many stories of the dead interspersed among them not only reflect the impermanence of everything, but also expose the dark side of the real society.

Then the reasons for these problems are obvious. Mainly because of the rapid development of society, people's life pressure is too great, and the negative emotions such as anger, unwillingness and jealousy accumulated in their hearts for a long time have nowhere to vent, so that they have embarked on the road of illegal crimes and become an extreme example in society. As for why this happens in the play, of course, it is because it is difficult to solve it in real life, or because it is difficult to attract social attention in real life.