Ahhh, but therein lies the superiority of Il-2's damage model. It is far, far easier to down a Ju-88 with a Hurricane MkI in that sim because you can start a fire with a good burst of BB fire; taking off the wing is not required.
How many clips of Luftwaffe gun cam footage have you seen where a B-17's wing came off from 20mm or even 30mm shells? I haven't seen one.