I'd normally agree, but in this case CCC explicitly said “black people can't get sunburnt”.

OTOH, I only get sunburnt if I do something deliberate such as sunbathing for an hour around noon in July in Italy, and even then it's relatively mild, and I'm not quite black; I'd expect darker-skinned people to be even more resistant than that. So I'd say that whereas black people can get sunburnt in principle, for all practical purposes they can't. This is still a hell of an advantage compared to the pale northern Europeans I knew who got sunburned by walking around in November in Ireland.