That's not racist. The Wikipedia definition is the belief in the superiority of another [0], which this doesn't fit.

Has nobody considered that blacks are a minority and therefore there is less data available for training or testing? This might always be the case, simply because there are fewer in America (where Apple designs it's phones).

[0]: https://en.m.wikipedia.org/wiki/Racism

Biased systems != racist.

Biased systems are just WRONG.