How come IVE didn't end up like post-IOI groups?

[Articulate]

The members are all extremely goodlooking and charismatic, great stage presence, choreo and debut song. Also even with wonyoung and yujin having a huge advantage with their idol career as Izone members, none of the new ive members are outshined by one another. They all look like super models with different charms. Stayc is also a group without any visual holes but Yoon in particular stands out the most and some members are just average pretty by idol standards. In Ive all girls could be visuals of any other idol groups and they are all very likeable.