[frozenseven]

>categorizing people by skin colour is ridiculous for almost all purposes

Sure. But race is most often about genetic (or ethno-linguistic) heritage, not skin color. A person from Japan might have the same skin color as someone from Greece.

[goatlover]

Sub-saharan Africans have greater genetic diversity than other continental populations. Race is just not an accurate categorization.

[helboi4]

Yup. Thanks for talking sense. There are tons of ethnicities in Africa. Which one exactly is the genetically stupid one?

[frozenseven]

>There are tons of ethnicities in Africa.

Only three large racial (genetic) groups in Sub-Saharan Africa.

>Which one exactly is the genetically stupid one?

You're trying to turn this into a normative claim, which it is not. And you started with the assumption that people are just saying this stuff for no reason at all.