And I don't recall any/many people insisting that ANY black British actor become Bond
They were listing Idris Elba as a British Male actor that would fit the Bond profile.
But I suppose Hugh Grant would be a more suitable Bond because he is white
Many sites recommended their thoughts on black actors/actresses (not all British, either) who could be Bond.
Chiwetel Ejiofor, Mahershala Ali, Lashana Lynch, Regé-Jean Page, Damson Idris, Daniel Kaluuya, Aldis Hodge, John Boyega, Yahya Abdul Mateen II, Jacob Anderson, Jodie Turner-Smith, Kingsley Ben-Adir, Tosin Cole, Sope Dirisu, Gugu Mbatha-Raw, Kirby Howell-Baptiste, Paapa Essiedu, etc. were some of the choices offered up.
Hugh Grant is too old and I honestly cannot see him in that physical of a role anyway. Not a good fit at all for Bond.