Why is Wonyoung's it girl title the most contested of all it girls?

I think it's because there have been multiple "it" girls in previous generations, across differing levels of popularity.

The term itself had no specific definition, other than being one of the most popular individuals idols at the time. Suzy could exist alongside Seolhyun, and Irene alongside Hwasa.

When it comes to 4th gen however, some people are choosing to gatekeep the term for only Wonyoung.

copium

they're just in denial cause they're haters. that's it.

i think it's bcs she's so much ahead of her peers, though i think it's mainly rival gg fans who deny her status, the average kpop fan knows wonyoung is the most popular idol of her generation