Oh, I know he wasn't part of the chat group, but staying silent isn't something to be proud of in this case neither is something that people will accept as a gray area. This scandal was the biggest ever in kpop so obviously people won't support anyone who was directly and indirectly involved.
I'm just pointing out that many people choose to ignore crime or not speak up about it. We have witnesses that refuse to testify. We don't know the motivation as to why they don't speak up. We can guess like fear of retaliation, culture, guilt, etc.
Of course, it isn't something to be proud of. He was cowardly in his action, but that isn't a crime.
He apologized for his inaction, and hopefully, he changed his ways.
I just find it weird that people are acting disgusted by Hyuna's choice, and they over exaggerate the role that Yong Junhyung played in the scandal. Junhyung and Hyuna are just old friends getting hitched after going through adversity. You see similar stories everywhere. They probably bonded through trauma. It isn't healthy, but it is understandable and very human.