It is a higher-order concern. Ethics trumps culture and strategy. It certainly seems plausible the "good ole boys club" style of corporate management can be be effective. Diverse voices have benefits, especially in not being blinded to many aspects of the market, but nevertheless homogeneity has some efficiencies. Yet, it is just plain wrong in most cases, independent of relevant benefits.

Is that even a thing?

You can't always make everyone happy.