I do understand the attempt to avoid generalization, but is is becoming more difficult to avoid.
And they wonder where prejudice comes from.
You see one crow and it’s black, you see another and it’s black, you see a hundred more and they’re black.
I think it’s reasonable to conclude that, even though you might have spotted an albino crow on rare occasjons, the next crow you’ll see will most likely be black.
Prejudice is nothing more than playing the odds based on reality.