[warner25]

The missions are flown through that airspace multiple times per day, and it's all for national security purposes. You can't put a hold on all commercial air traffic every time, and you need to train the pilots to navigate and communicate through that particular airspace.

Whether the system (i.e. separating rotary-wing and fixed-wing traffic there) can be more safely designed is a question for the FAA. The military aircraft are simply abiding by FAA rules for that airspace. Many more civilian helicopters are doing the same thing.