>if this argument is that if diversity were actually a strength, then the companies that have embraced it would have outcompeted the backward companies that hav

>if this argument is that if diversity were actually a strength, then the companies that have embraced it would have outcompeted the backward companies that haven't; and we wouldn't be seeing discriminatory practices among the Fortune 500 companies You're assuming that companies outside of this set of Fortune 500 companies are less discriminatory. Maybe the Fortune 500 are the least bad. Even if the Fortune 500 were the most discriminatory, their size and entrenched position in the market could allow them to stay on top in spite of this and many other weaknesses.