I'm thinking it's HT's way of getting the bomber pilots to actually have to exercise instead of bomb and bail.
All that running back an forth is good for you.
Seriously though it's a good idea and i think it's been brought up a few times. The lag issue has always kept them from putting it into the game if i remember correctly. It would be nice if you could at least have 3 total, 2 manning, then you jumping in the unmanned if attacked for a total of 3 manned guns. They can put 2 in fighter/attack, gv, bomber, i don't think adding a single one should be to hard to do in a bomber formation. Then again i'm not a computer programmer...........but i did stay at a holiday inn once.