[Marek_Tucan]

Assume the game scale. The max map dimension is what? 200 hexes, about 10 kilometers. Strafing aircrafts in such distance of their targets would be most likely already below the heavy AAA minimal effective range, in an area where the heavy gun cannot track its movement quickly enough.
I do recommend reading "The Big Circus" by Clostermann. IIRC he mentions 88's specifically once, and that wasn't during a ground strike but during a CAP. But he spends literally pages on describing light AA fire and losses that it did cause to them while strafing.