@BalrogDeMorgoth I don't disagree with what you say, but what she's saying is not that anyone accused of anything should be lynched, but that those proven guilty beyond reasonable doubt shouldn't be granted excessively light sentences. She's talking about proportionality of sentencing, which is also a pillar of modern law theory.
Now, before you reply to this, notice that I'm not saying that I agree with her points. I'm not in favour of retributive justice, which is the premise of this series. I'm in favour of criminal justice as a means to rehabilitation, prevention of reincidence and protection of society from violent elements, not as a way to provide cathartic relief of sorrow by the affected. I'm just saying that she's not arguing what you say she is.
And curiously, I don't think this author supports retributive justice, either. I think he's cleverly being the devil's advocate, especially in the metaphoric introductions to some chapters, like the Chinese beast that impales criminals and the design of Themis statues; but given that reporter Chae and even more so Ji Young are depicted as wild-eyed, mentally unstable nutjobs, I think the message is that mob justice and vigilantism are far from being solutions.