And that's because big companies don't care. Why go for individual promo when their top girl groups are making so much money through streams, sales, touring, etc.
Top female idols have no reason to extend to an actress career or variety to stay relevant with the public or whatever now cause they have a fanbase. Wasn't really the case for a while but here we are. If they do it'll probably be more of a passion thing or a few roles and not a full on career.
I understand why so many people are frustrated with JYP's decision to not individually promote their female idols but honestly can you blame them. When both Itzy and TWICE are pulling more money for the company through album sales and touring then they likely ever will through CFs (that go more to the idol anyway)
Big reason why Wonyoung is the only real 4th gen IT Girl right now is ironically cause of the company she's under. She's SSE's biggest idol since the 2nd gen, so yeah ofc they're gonna accept every single CF and commercial that goes her way, milk her (& IVE as a whole tbh) while she's in her heyday before they inevitably fade back into irrelevancy. Yujin is up there for the same reason. Big3 companies have nothing else to lose though cause whatever group or idol they pump out will be successful and popular either way. And this is kinda why I think the likes of Karina etc aren't really getting solo gigs.
What do you think
I kinda rushed on this so sorry if it's hard to understand