A and C,
What is your definition of high risk?
I only ask because I consider the lead computing task for a manually aimed 'truck mounted AAA' device to be quite tricky given the range a high angle strafe attack will 'open' at. Given the attack will be made at high speed (due to wanting to align the fuselage with the attack) the aircraft should have a sizeable energy package for jinking post 'close'.
Naturally you can ignore sun, atmospherics and fly a predictable path to the open which does play into enemy hands, and other weapon systems available to them (shoulder launched IR, radar laid AAA etc) will raise the risk.
I will also accept that modern views of risk and the under current of losses of both aircraft and aircrew being unacceptable/ unfathomable do lend weight to your argument. I'd still like to know what metric you were using in the probability versus impact grid to give you a 'high'.