There Was No Good Option Here.

There was no good option here.

It’s simple. Y’all saying she’s selfish and a coward but

PINK DIAMOND HAD NO CHOICE. 

Let us review her options, and their outcomes :

Option A : Pink Diamond does nothing to stop the colonisation.

Outcome : The colony is completed. Everything on Earth dies.

Option B : Pink Diamond asks the Diamonds to stop the colonisation, peacefully.

Outcome : Diamonds : Don’t care, didn’t read lol.

Option C : Pink Diamond tells her subjects to stop (probably happened, so it’s almost the same as Option B)

Outcome : Diamonds : What are you doing ? Ok, you’re just lazy and childish. Give me back that colony. 

Pink loses her colony and a lot of her power as a Diamond.

Option D : Pink Diamond leads an official war on her older sisters.

Outcome : Diamonds : What are you doing ? Are you serious right now ? Ok, it’s not funny anymore. You, the youngest, weakest Diamond, our little sister, is rebelling against the Diamond Authority after all we gave to you ? 

The war is lost by Pink (smaller army, one incomplete colony against several), all of her army is wiped, corrupted or shattered. Actually, not only her army but also her subjects : Lapis Lazulis, Pearls, Peridots, all of her subjects are wiped and she loses everything. Earth becomes a colony.

Option E : Pink Diamond leads a secret rebellion to have another excuse to stop the colony. Her subjects has the choice to rejoin the rebellion and be free or to go back to Homeworld.

Outcome : Diamonds : The rebellion will be destroyed. Keep going.

Option F : Pink Diamond fakes her death because Blue tells her the colonisation won’t stop as long as she’s here to lead.

Outcome : Earth is left alone, her subjects are either free or alive in Homeworld. That’s what she thought would happen. But we all know what actually happened : Earth was left alone, but the rebellion got corrupted. A large part of her subjects were saved thanks to this sacrifice, because they were siding with the Diamonds, thinking they were siding with Pink. Her soldiers, her court, all of her subjects actually had the choice to be part of the rebellion or to go back to Homeworld. She saved them, when an official war would have get them all killed or corrupted.

Again, tell me what she could have done more ? 

Let Earth die ? Lead everyone into a lost war ? There was not other possibilities. The one she chose was not perfect, but between all of them, it was the only one that was less terrible. 

Yes, Pink was childish. But it’s also what gave her the possibility to see what Earth was, beyond a planet to make a colony. She fell for Earth and she took the best choice for Earth and her subjects : save or free them.