Shakespeare's plays Julius Ceasar, Antony & Cleopatra, King John, Henry VI, Richard III are all "histories"... and all flawed as histories. Fact and Art (as in "artifice") are not one and the same. I recall that War & Peace and Les Miserables... two epic novels filled with depictions of the Napoleonic Wars... offer two very different views of the topic. (Not unlike J.L. David's vs Goya's views on the same subject.
That is precisely why I'm so ambivalent about it. But I notice that some such films somehow work, while others do not, and it has nothing to do with the level of accuracy.
Now I ask myself whether, if the plays and novels you mention were set in completely fictional worlds, they would have had the same impact. Fiction is one way in which we collectively "deal" with history, trying to find, perhaps, its direction or some sense of meaning in it all. To some extent they perhaps also help us to deal with the present - one can see this at work in the current vogue for "diverse" casts to play in historical films, or otherwise tweaking history to reflect current values and interests.
This is both a noble endeavor, and complete folly, at the same time.
Now if a director has "something to say" he can get away with inaccuracy -
Amadeus is a great film, inaccuracy or not, because straightforward biopic was not the point to begin with, any more than Shakespeare was trying to accurately portray history. Of course, the whole thing is still fraught with danger: some points are more valid than others, and where is the line really between interesting social commentary and mere propaganda?
Seems to me that if a director just wants to portray history, he should be as accurate as possible, while if he has some point to make, he should take care about which points he makes and how. One can of course combine it too:
Master and Commander is a great film for its drama, but apparently also superbly accurate.
Dances with Wolves is a great film story-wise, but utter nonsense historically, and indeed perhaps the first outpost of today's vogue for wokester-style revisionism.
But film history is littered with propaganda films. Indeed, in a sense,
any movie is propaganda. Perhaps the trick is for the viewer to try not to fall for the propaganda, but this can be difficult in media which are specifically designed to work up one's emotions.
As I noted, I don't really have clear answers here and my feelings about the whole thing are ambivalent. I have greatly enjoyed some historical films and biopics, and been downright offended by some others, and I cannot always explain even my own reactions, let alone make sweeping general statements.
Nowadays I try not to judge, and instead to simply observe history - including film history - unfold before my eyes. In a century, people will have a different perspective. I shake my head at the thought that in 1922 people thought
Nosferatu terrifying, and no doubt, in another century, people will be equally bemused about my opinions on current films. I find I actually enjoy films more, and notice all manner of interesting things, when I am
less emotionally involved than when I allow myself to get all worked up.
Here's an example: above I mentioned the phenomenon of wokesterism in movies. What I find interesting is that the level of public outrage or irritation differs quite a bit depending on the exact genre. Nobody really bats an eyelid when a black actor plays Macbeth (as Denzel Washington did in a recent filmed version of the play) or when black singers portray roles in traditionally very white operas. Virtually everyone somehow intuitively understands that those productions are hugely stylized to begin with.
But compare this with the public irritation at seeing black mermaids or black dwarves and elves, etc. Or Snow White as, say, an overweight red-head. Or consider my own (surely thoroughly irrational) reaction to two TV series with "strong female characters":
Blue Eye Samurai acclaimed,
The Equalizer panned as wokester nonsense.
I don't really know why "diversifying" the cast will somehow work in some cases but not others, but I find it interesting to watch the story unfold.