As an individual, it's not really possible to treat everyone equally.
Do you treat people unequally if you know they are smarter? What if someone else told you they were smart? If they have a high IQ, would that matter to you? Based on which college they graduated from? If they work 16 hours a week? What about 16 hours a day?
Attractiveness is an indicator just like any other [1]. It's just a reality.