The BSAA don't actually drop like flies considering the situations they faced, the B.O.W's seen in RE6 were among some of the most dangerous in the entire series and the J'avo are far superior to the Molded, the can mutate, skillfully use firearms and even proficient in hand to hand combat. There's always casualties in a warzone, that's inevitable.
I know the BSAA dies a lot but at the same time they are the ones who resolved most of the population's problems with
B.O.Ws:
- The Veltro conspiracy; - Kijuju Operation;
- Edonia Civil War; - Marhawa Academy;
- The Stage;
- Lanshiang bioterrorist attack; - New York City bioterrorist attack;
The BSAA fought and won all these incidents mentioned above.