Either you have not met some Experten gunners, or you way of fighting is different from mine.
Normally I do the classic high 12 attack, and if gunners are not good I get a kill.
Many experten B17 gunners have you smoking at 1.5k, and when you hit the trigger at 600-800 yards trigger , you don't have any wingtips anymore.
99000,chris3 and some other guys make you pay, even with the smallest, most heavily armored plane in-game.
lesser skilled gunner oil you at 1000 on a high 12 attack,or even from the side. only from top you can get a free kill, if the lead plane don't roll and drones warp (I see that more often now than for 6 months ago)
I can live with perks for R4m, then I can spend my 15.500 perks on something useful, and not just collecting them for fun.