Because at the end of the game Joel destroys humanities last chance of solving the problem and saving then all so thanks to Joel humanity is doomed and in a few generations no humans will be left
They are the last of us
Not really. Ellie is infected with a unique strain of the fungus, she could potentially spread it herself to protect other humans. Jumping straight to killing mankind's last hope was the fireflies objective. She can still provide a solution, but I kind of doubt they'll take that route. ---
What did the pirate say on his 80th birthday? Aye Matey!