I agree. I don't think a black Anne Boleyn is appropriate and I'd love to see original programmes about African or Chinese women for instance.
I often love stories set in entirely different places.
However, I think from the POV of a risk adverse production, where they are scared to death of being called out, it is risky. Because almost no matter what you do someone will say they are getting the politics wrong, or if there are Europeans in the story they are npt being as awful as they should be, or there isn't enough context of some kind.
And realistically, when you are creating story for westerners that is set in a really different place, it does sometimes have to be done in a way that means they can understand it. I sometimes like to watch Indian tv shows, and one of the things I find is that i can tell sometimes that there is something going on that I am missing, or some interaction or event has significance that I am missing. Occasionally dialogue I can see is important but I don't understand what they are talking about really.
Which I expect in stories from other cultures, in other languages, but it's not really what you want when writing a story about a place like India to show in the UK, at least not too much of it.
So they always run the risk of being accused of pandering to a white, by which they mean western English speaking, audience.
I don't think any adaptations of old books or shows being made now are any good. They are largely shockingly bad.