I'm surprised - in AH terms, I only thought damage from ammo was cumulative - not stress from repeatedly bending of airframe.
Take a few bullets in the spitfires wing, then do a hard G pull - it comes off everytime, same for any other aircraft.
I had the unfortunate way of learning during an FSO in a P40N, took a few rounds then spotted buffs on the deck, thought I could
dive to 500mph through the formation and zoom climb, except I yanked down hard and well...no more wings! lol