If you could only introduce a little intellectual rigour to your thinking you'll find that nothing I've said, or chose to overlook, is contradictory to my central point. I'm sure you'd welcome a male black actor portraying Margaret Thatcher if his acting was good enough. Anyway there's no point continuing an exchange as you're clearly woke and this now risks contravening the no-politics rule. 
Blimey, how awful of me. Welcoming someone who can do their job well. Shakespeare's casts were all men. I've seen all female versions of some of his output. Some has stood up well. Some hasn't. But no greater or lesser than proportions of other productions.
There are also lots of reimagines of classic texts. The point of them is to make them more accessible to a different audience. There were probably similar discussions when Return to the Forbidden Planet came out, or Kiss me Kate.
A male, black Thatcher? Bit different to playing a life form that regenerates into different forms. But again, I think a lot of responsibility would lie with the writer and director as to whether it worked or not.
I'm not sure what your central point is? That you have already pigeon holed him based on...I'm sorry how much personal experience of his performance breadth do you have?
Woke? possibly. Sleep well.
