Luck? 1 black person, 3 south Asian in total for me.

But for an out of context imaginary future... why would you choose non-black people? There's about the same reason to go with any random look.

So, the answer to the question "Do western AI models mostly default to white people?" is clearly a resounding: no, they don't.

No. But neither black people. Or anyone specifically. So we got to a nice balance it seems.