Why can’t people see there is a massive difference in colour-blind casting when it comes to a figure where skin colour isn’t an integral part of the story as in this case, and one where it is (eg Rosa Parks).
Because when it's a real person such as Anne Boleyn (even if there's some dramatic licence involved in the events), their race is an integral part of their story, upon which the production is based, even if not overtly so because they were a member of the majority. You or I would have had a different family history and life experience if we were a different race. More so in Tudor Britain. This isn't the same as casting a prettier or taller actress than Anne probably really was.
It's these sorts of arguments that lead to accusations of wokeness etc. Consistency is needed.
I get that for a minority or oppressed group, race will be a bigger part of a person's experience and awareness. However the absence of that is a part of life for the majority race. What about white privilege? You don't think there's a good chance Anne Boleyn would have experienced white privilege compared to Catherine of Aragon's non- white attendants? I read somewhere that a lot of them ended up in morganitic relationships (not Catalina de Cardones), not married to the king.
I would argue that either we need to be conscious of things like ensuring that a real character is played by someone of the right race to reflect their life experience and background or we don't.
I know that a lot of whitewashing has already happened. However, films and programmes already made cannot be changed except for an explanatory message being shown. This is about setting a standard for the future and it needs to be a consistent one. I don't think the answer is just sticking (no doubt very good in this case) black actors in the roles of real white people and saying 'well, she's the best actress and race wasn't a big part of the story'.
This is not just an artistic point, it is of course also a political point to do with the push for equality. I personally don't think this sort of casting helps. This is no reflection on Jodie Turner Smith.
If it's a fictional character, be that Guinevere or Gail Platt, or a non-realistic portrayal rather than just a dramatic retelling (such as that film about Bob Dylan where all sorts of actors play him) I fully agree that unless race is key to the story then the race of the actor is not important.