I guess I don't understand, the last time I checked the dictionary the word "Equal" means " of the SAME measure". Call me a bona fide idiot if you will, but honestly I am now baffled!
Well, are all people the same? Obviously not, but we consider them all to be equal on some level.
And that's the answer. You can't pretend that everybody is exactly the same and you can't treat everybody exactly the same. And if equal has to mean exactly the same, then people aren't equal either, so it doesn't matter.