"When I can’t handle myself/ability, how can you handle it?" ~Tae Gongsil
This is really important to Gongsil, and frankly to everyone -it’s just hard to identify with b/c she sees ghosts. It’s like how a drug addict or gambler would want to get ahold of their problem before a relationship. A less dramatic example would be someone getting their degree before marriage. Does it mean less time for the relationship? -yes. Will it actually help the relationship in the future (by providing a stable income)? -yes. But is that why I want a degree? -No. I want a degree bc it will give me something ->a sense of accomplishment, security, pride, dignity -whatever.
Remember Gongsil just went back to Woojin, even though helping Woojin got her love killed. She needs to know that she won’t put Joongwon in danger anymore. She needs to have control over her behavior. She needs to have a sense of dignity or pride in herself before she can do anything else. And her method is to UNDERSTAND where the gift came from (and possibly get rid of it). So Gongsil needs to leave, not only for his protection, or for the relationship -it’s ultimately for herself. The reason they need to break fully, is bc she is unsure of the outcome. She doesn’t know if she’ll love herself enough to be able to have a healthy relationship with Joongwon (by not needing to cling to him), or if she can rid the ghosts entirely. It’s not fair to keep him waiting.
Secondly, know that Joongwon’s lines in that scene are all posturing. He’s just trying to keep his pride in tact. To the very end, he told her not go. It was only by seeing her tears, and how upset her sight makes her that he realizes this is important for her. He is not instigating a breakup, he is accepting her decision. And for her decision (to either rid herself of her sight or fully embrace it) to have any meaning, she can’t have a backup plan -namely to have a bomb shelter i.e. Joongwon. So he can’t even say he’ll wait -even if he wants to (which he may not want to do) - even if he does end up waiting for her.
— Secretary Tak to Lee Gun