[throwaway23597]

I mean honestly, you can't possibly think that just adding people of other gender / skin colors just magically improves profitability. There's clearly some lurking variables here that McKinsey purposefully ignored in order to draw this specific conclusion.

[turtlesdown11]

I believe viewpoint diversity adds value to product ideation, design, execution, etc.

[tristor]

It does not necessarily follow that diversity of immutable characteristics creates viewpoint diversity. Ironically, most companies seem to actively stamp out viewpoint diversity as part of their corporate culture (both as part of and distinct from any DEI initiatives they may have).

[AlbertCory]

That's fine. You haven't cited any compelling evidence of it, though, as all the responses have pointed out.