"To be clear, though, this diversity refers only to diversity of opinion, not necessarily to demographic diversity. So why is demographic diversity important?

"Demographic diversity is an indicator. It’s a reasonable inference that a group that is homogeneous in appearance was probably chosen by a biased selector."

How about some supporting evidence?

Better yet, how about some evidence that demographic diversity (ethnicity, age, gender, income/wealth) is a useful indicator of useful diversity. After all, that's your claim.

Of course, if you do show that such diversity is an indicator of useful diversity, you've just shown that one should select against certain such characteristics in (albeit not necessarily the same characteristics) in almost every situation. Why? Because in each situation, some characteristics are better than others.

That doesn't imply that a team won't be diverse, just that, if you're correct, successful teams will be more likely to have certain "looks" in each role.

I think that that's bunk, but I can't explain why there hasn't been a white DB in the NFL for several years.