Yeah, but who would want to live in a society built by the Fireflies? They showed what they were all about by not asking Ellie, and letting her be the hero. She would have said yes. You can imagine it would've been like Robespierre's Reign of Terror.
society built by Fireflies is better than the world they living in now with all the zombies and cannibals
So, giving up what makes us human in the end is the rescue of humanity?
aKa grabbing a little girl while she's unconscious and wanting to cut her open and kill her whilst she CLEARLY showed she had the intention to live?
No, that price is TOO DAMN HIGH to pay for the "sake of humanity", because if our society would be based upon THIS VERY ACT then it would turn US into the monsters. Lol dude, look at all the atrocities in the real world. Terrible shit happens everywhere.