Most comments are like “just because you write your own songs doesn’t mean they are good lol”. They get so passive aggressive when Koreans call those idols geniuses, even though it’s just a figure of speech. Or they claim self-writing idols is just a gimmick and the only thing the idol does is a write their name on the credits.
Why the hostility? Because it breaks the illusion of living through their biases.
If their idols don’t self-write it reflects back on fans, and they have to think what they cannot do in their own lives. They say the scariest thing you can show to a person stuck inside their own self-made illusion is a mirror.