"At the moment the research shows that more diverse companies are better. Ftfy.
Argue with the methods and results all you like but don't pretend you have science on your side."
Could you please direct me to that research? The Economist discussed this a few weeks ago, and again months before that, and on both occasions said no correlation has been found. In particular, the studies so far done have produced very mixed results.
You cannot claim to have science on your side without producing high-quality evidence of it.
Edit: most of the statements about diversity is that it helps reduce 'group-think'. But this is a deeply racist and sexist thing to say: it assumes that all white men have the same experiences. The corollary is that all black women have the same experiences as well. If you only hire people from Harvard Law, then you are going to get group-think, regardless of the genitalia and skin colour of the people involved.