Originally Posted by wild-card:
“some parts are for black people and some parts are for white people”
If more people had that attitude, he'd never have had Michael Clarke Duncan's fantastic performance as Kingpin - arguably one of the few good things about the original cut of Daredevil.
The key point is, in spite of that, of course, the Doctor regularly changes what he looks like as a person, Blade does not. Therefore when one casts Blade, on does so to find someone who looks like the established image of Blade. There is no established image of Docs 11, 12 and 13. Well... Hmm... 13 is shaky, actually. But I don't know my old-school DW enough to speak confidently on that subject.