I once heard something from someone I never want to agree with but it was a decent point. If intelligence is part of the biological lottery and we value it as an employer for all the advantages it could bring your business, then it's fair to think that someone who is attractive has won a similar genetic lottery and it could bring similar benefits to your business.
It's something I want to disagree with, except I can see that there is more truth to it than not, even if it goes against what I believe the world should be.