Earlier quoted context omitted.
That's exactly because it's a strong, widely shared cognitive bias (wired or not) that it's so important to counter it culturally. Countering natural behavior with culture is what humans do, for better or worse.
And how is that going for you so far?
If you really care :-) :
I had the chance to be raised and still live in a very mixed part of Paris. There is racism, of course, and for example I can remember how kids of Portuguese descent were the object of mockery back when I was young. (That's significant because today it's put under the carpet as if it never occurred. It seems nobody even remember!).
That makes you think about bias, how bias turn into systematic racism, etc. That makes you discover how people of course cluster around commonalities but also like to share and connect with others when given a safe context.
Racism is quite pervasive in France, and for example younger generations make it a central part of their dialogue and jokes. But many people are working toward inclusiveness too.
Just like women equality and wealth sharing, non-discrimination is not solved thing in any given society: it's a constant challenge to tackle, probably without an end in sight.
It's probably the same for individuals: how can I be more inclusive? Less biased toward others?