Just think of it like this.
You are an allied pilot who makes a run with the bombers and you come home because of fuel or ammo and land. You just gave up a life to do your job.
So you have a bunch of pilots with one life who go back out to hunt. They get killed and its over for them. They did nothing wrong in their first life lived survived and they still lose a plane.
At the end of the frame you have very few allied planes and a lot of bored Axis pilots. I am not viewing this from any side.
As for the getting hell Jager you have to fly once and a while to give hell