Yes I fully understand the point your making John, but in my opinion (not that it's worth a lot) I do feel if a film maker goes to the bother of taking a major event in history which the majority of us are aware of it tends to lead you to believe it's going to be a reasonably accurate account. they should tell it as it happened, if not then give it another title.
I enjoyed JFK ad Nixon, I felt both were reasonably accurate.

There will be a block buster within the next decade recalling the events of September the eleventh 2001. I imagine it will be a historically accurate account of the events of that day. (I know a few low budget films have already been made about it) directors know people today do expect more than they did a decade ago.

Hope this makes sense to you !