Blame Myth for being overachievers.
If Calli hadn't debuted with a full EP, if Ina hadn't been a professional artist, if Ame hadn't put together half of the entire gen's debut assets by herself, if Gura hadn't supercharged it all by being #1 memelord and karaoke master. Kiara also proved herself but more in the traditional "along the way" sense.
I think there's a clear "before Myth" and "after Myth" line where skills went from neat things, to expected and required as a differentiator. It comes both from setting the bar and exploding the market to where it can attract established talents. Calli herself said yesterday that there were "thousands" of applicants for Myth, and then said there were tens of thousands now.