My Brain Is So Filled With Thoughts About The Relationship Between Homura Madoka The Incubators And Time I Can't Express It Well - Tumblr Posts

In a sense, Homura is the "audience" that dictates who gets the spotlight while the incubators are the "directors" who decide what that spotlight entails.

Madoka is the center of Homura's everything (time travel, attention, affection, ect) and therefore she becomes the center of the universe too.

Madoka being the protagonist of the story just further cements that Homura's timeloop could never have worked. No matter what, Madoka would always be in the spotlight, she could never be just a normal person, not after this.