Cause the posibilities of succeding as an Idol after your 20s decreases incredibly (not like a singer or musician) and taking in count Nico isnt specially talented compared to other girls... Well i hate to say it but you need to be high to honestly think she could succed
Well yes but also no. I remember my idol hell years, following LLS! idols- from concerts to interviews, radios, etc. And if i remembered aright, they were all at least in their early twenties when they started. These girls' werent very 'talented' when they began too. And some fans were griping about their subpar singing. But the bulk of the fans defended them, pointing out that you arent really enjoying their performances for their talent, it's more about watching them have fun, etc. Though i guess it's a gray area since theyre technically VAs too, idk.
My point being- nico has potential to succeed, the people working with her just didnt find the right audience.
This is my speculation but maybe japanese authors tend to write her like this since nico is literally the opposite of what japan stands for- being a normal functioning citizen and not standing out. But dont quote me on that.