Homo sapien has been a distinct species for over 200 millenia. We've only advanced to the point we are largely in the time frame of the last two centuries, or 0.001 percent.
And we've had the benefit of not being under threat of violent magical cataclysms and pantheons of temperamental deities duking it out. Unless you're one of the religious folks.
My campaign setting, however, might have about 2 millienia under its belt. Which means my guys are ahead of the curve.
Morbidly aware of my privileged and subconsciously trained by racebaiting dialogue, I always find this kinda thing makes me flinch. I even did it when I made my Orcs Berber/Bedouin.