In almost all cases, there were people in the protected group who were able to disguise that status. So in those cases just 5 senses weren't perfect. But it was sufficient for at least some cases, which is where the laws came from.
You cannot, for instance, fire someone for being black. These characteristics are protected in the sense that discrimination against them in certain areas is illegal.
Ok, but then the US Air Force would not hire anyone shorter than 64 inches or taller than 77 inches. Your height is a part of your genetics, you can't change it.
Why are people outside of this range not protected? Am I oversimplifying something here?
