The scariest thing about the "Mockingjay" movies from the Hunger Games series, is how they are eerily realistic. In Part 1, an entire movie is spent dealing with wartime post-traumatic stress disorder (PTSD), which have affected and messed up the lives of so many veterans. In Part 2 the plot revolves around three overarching themes, namely how in wartime:
1) there are no heroes, just confusion -- as nobody knows who did what, or why, in the fog of war
2) there is no good vs evil -- just each side fighting for its own self-interests
3) there are no winners, just losers -- with innocent civilians losing the most
Another creepy parallel is the rebels' heavy use of propaganda in Mockingjay, just like ISIL in Iraq and Syria.
The point is that it doesn't matter what Katniss or the rest of the characters do, or the fact that they exist at all. The outcome of the war is determined by things happening outside of anybody's control, of bombs exploding that nobody knows who triggered...