I'm very sorry you find it problematic. I do as well, and I'm not saying that it is a fair definition. But I think that that is how many people judge other people, and that while it isn't the most important thing about you, it's something that has been shown to be important societally and culturally.

Again, I'm not arguing that it is a right or a fair definition. But then again, neither is the fact that being born with skin of a different color means that you are treated differently, whether it's having more privileges or less.