Why did Lee Si Eon and Seo In Gook object to being cast in ”Reply 1997”? ... ”Because my eyes are narrow?”

Lee Si Eon revealed the reason why she was against Seo In Gook being cast in "Reply 1997".
Ji Won escaped from his indoor lifestyle and headed outdoors for the first time in a long time. He ran over shouting "Brother!" to find I Si An and Seo In Gook. The three of them had been friends since they met 12 years ago.
Eun Ji Won, who met on tvN's "Reply 1997," went to an internet cafe for her vacation. She took her younger brothers, who love games, to a guesthouse that was designed to look like an internet cafe.
After playing games and singing karaoke, the three of them started talking about the 12-year-old "Reply 1997" while eating hamburgers, horumon, and fried chicken.
Lee Si Eon was 35, Lee Si Eon was 31, and Seo In Guk was 26, but they played friends of the same age and gained huge popularity. Eun Ji Won said, "Lee Si Eon was very happy to be cast as Seo In Guk.
"Why did you object to the role?" Lee Si Eon answered frankly, "First of all, I didn't like his face. I wondered how someone with such narrow eyes could express pure love."
Seo In Gook responded, "I didn't feel bad. I'm not famous. Why would someone I've never seen or heard of be cast?"
This made Lee Si Eon feel awkward. However, the two became best friends through this project and have remained close ever since. Lee Si Eon said, "I had only been in my third year since debuting at that time, so I thought, what if it didn't work out?
I was thinking about doing it. I had a drink and cried. Seo In Guk said, 'Brother, we're going to be fine. Don't worry.'" Seo In Guk said, "At that time, I was really
It was pathetic,” he teased.