Because High School Musical and Hannah Montana literally made Disney think that every show after it, bar Good Luck Charlie and WOWP, had to be of famous people.

Shake It Up, Austin & Ally, Dog With a Blog, Jessie, the works.

Raven and Zack and Cody had their quirks, but they weren't famous. The Russos were magical, but they weren't famous, and to an extent.

And let's be real, everything lacks in quality now.

But High School Musical wasn't about fame.

But I like liv and maddy

This.

It's not a bad show, actually. It tackles issues and doesn't have the mindset that "Being famous will get you somewhere."

It also gives a message that you can be somebody in life. Like for instance, Topanga is a lawyer and Cory is a teacher.