I think it makes sense that in a country where the majority is not white the yellow emoji is picked to represent the majority.

So you'd think white people in a minority white country would not use the standard emoji? I doubt anyone would care.

the problem is that some countries have majority skin colors and significant minority skin colors, and the majority has not been nice to the minority, so in those countries it's an issue and they sort of export the problem to everybody else via a process of memetic transferal.