But it does have something to do with being outnumbered. This is the culmination of the entire FS2 story where the GTA is so completely outnumbered and outgunned that they destroy entire nodes just to survive! So this screenshot is more subtle than perhaps what most people thought of for the topic. It gives the sense of dread and, in a round about way, it reminds you just how many Saths the Shivans have since they even sacrifice a few to destroy a star.
And just to be clear, this is an in-game screenshot. No post production was done on it at all. I kept the mod pack in case I have to prove it.