Do you want a complete weather database that exactly duplicates the historic weather day by day?
Do you want to duplicate each and every radio dispatch and have decoding staff working around the clock to deliver intepretations?
Do you want to simulate the exact mechanical process used to create the steel used to build the ships/planes/etc that we use and make sure that you duplicate any structural flaws due to welder Bob coming to work after having a fight with his wife about his kid's allowance money and putting a bad seam on boiler number three that in turn causes the boiler to explode at exactly the wrong time when the ship happens to need emergency power to turn into the torpedo so it misses?
If you want reality, go read the history books, as that is the ONLY reality available. Simulations on the other hand offer one the ability to play around with some VERY LIMITED aspects of history to have some fun. No matter how much effort is put into writing a simulator, it is NOT reality in any way shape or form. It is a SIMULATOR of what COULD POSSIBLY HAPPEN. Not a recreation of what DID happen.
Your post stating you sunk USA CV's in scenario 16 means nothing, as in REALITY, it didn't happen. You complain that you can't recreate one specific event but you are perfectly ok with having this happen? Wheres the logic?

Reality would consist of us watching UV as the computer played turn after turn by itself, with completely predetermined outcome based on what historically happened. Not really much fun to sit at your computer and simply hit next 500+ times to watch the pre-determined results go by.