Should not be in, but one will find itself in that situation, so why not give the pilot a something to tip things in their favor a little. Just because something's not meant to be in a particular situation, does not mean it will never find itself in that situation, especialy in a battlefield situation. crap happens, doesn't hurt to be prepared. 
Remember this line... 
VF-11 pilot: "crap! my gunpod's jammed! Mayday! Mayday!" 
Like with Isamu's wingman in Macross Plus, you just might find yourself in a situation where the enemy is in your face and you can't shoot them.