Remember, we as aviation and history buffs, are in the minority.
To the average tourist (the third that go to New Orleans, the museum is a way to get out of the heat or maybe walk off last night's excesses.
They get a big picture look at the war and a chance to talk about grandfathers and great uncles....it They to regurgitate some facts they picked up on The History Channel.
They don't care (or know) if the aircraft hanging above their heads is "real" or not. A fiberglass model or composite airframe works for them.
Good thing since the museum probably can't afford a top of the line quality warbird, and why "waste" (I know it's not really a waste but you know what I mean) in a museum like this? I'd rather see them flying or where they would be better appreciated.
After working as a volunteer docent at a local air museum for the past three years, I have learned the details don't mean a lot to the average visitor..
One of our aircraft has a significant combat history (7 kills), but was rebuilt after a wartime crash.
No visitor has ever expressed horror at the fact that it is a total rebuild...unlike some of the more sensitive members here.
To them, it's just an aircraft with a great backstory.
So yes, sometimes with "us" too much knowledge can get in the way of appreciating artifacts (and yes, they are artifacts even if rebuilt).