you already know this but i'll bite the bait.
Pink was a "child" of dictators -- her only conception of being validated as an equal was to emulate the other Diamonds. And despite the level of indoctrination, she changed her tune incredibly quick when she finally experienced Earth directly, probably because of empathy or whatever.>omg she killed shit
Yeah, and Americans killed Brits in 1776, and vice versa. Lives of a few for the lives of many, etc.
And then on top of that, an immortal being sacrificed herself to create a new entity because she realized that she was not good enough to overturn the Diamonds, etc.
So without Pink's rebellion and sacrifice, the Diamonds would have never capitulated, freed their subjects, and stopped their colonization of the galaxy. Yeah it took 6000 years, but imagine the gems, off-colors, and incalculable other lifeforms who have been saved and freed thanks to Pink.