I said that the reality of WWII was that un-escorted bombers were shot down in very large numbers
[and in AH bombers are not]
Your perception is incorrect.
One of the raids you talk about that nearly broke the back of the 8th AF was the unescorted 2nd Raid on Schweinfurt (aka "Black Thursday"). In that raid, out of 291 B-17's, 60 didn't make it back, for a loss rate of 21%.
In Scenarios (which are set up more akin to actual battles -- i.e., large groups of bombers against historical opponents), loss rate of unescorted bombers when found by the enemy is generally about 100%. We have seen this many times in Scenarios, such as in Der Grosse Schlag, Battle Over Germany, and Der Grosse Schlag II. Those were Scenarios with B-17's.
We also have many scenarios with other types of bombers: Battle of Britain (Ju 88's and He 111's), Rangoon (G4M's), Red Storm / Krupp Steel (Ju 88's and B-25's), Tunisia (Ju 88's and B-25's), The Final Battle (Lancs), Philippine Phandango (Ki-67's and B-25's), Mediterranean Maelstrom (Ju 88's). Bombers generally get massacred (close to 100% losses) when they are found without escort and pounced upon. I can tell you this from direct experience of that in all of the Scenarios mentioned.
Even escorted groups can have fairly high loss rates. 50% isn't uncommon.
Thus, in Scenarios, bomber loss rate is higher than historical. That is probably because people don't really die in AH, and so attackers press their attacks to the limit.