Flayed the general idea in bombers is to make it to your target, take out said target, and make it home. I'd say your thinking is right on the money.
On the other hand if one makes a living out of bombing tactical strats, ords, dars, troops, fuel, on bases that actually matter in the fight. If your going after these targets at these bases????
Your going to find reason to heat up your bomber guns. That or "reason" will find you. Most of all with the knits, who seem to take tactical bombing of their bases personally.
Last night I was being chased by a Bish Mossie and P-47 while in my pork store B-26s. For whatever reason they broke off, "the Mossie expended all its ammo while 2,000 yrds off". Maybe they were low on fuel, maybe ammo, maybe they had to clean their room. However if it was Knits chasing me then 99.9% of the time its going to end with one of us hitting the chutes. Or, a damaged fighter breaking off.