Modern is the hill I will die on. It's blue and pretty and compact and doesn't get in the way.
Madness string 84899
In any enterprise - business, military, academic, sports, etc. - leadership gets the behavior that they reward. Being a parent is a leadership position, and these parents have taught their other kids that acting like the middle sister is the behavior that they reward. They can't be surprised that their other kids have learned the lesson they've taught.