It very much echoes my remarks that a diversity of viewpoints is essential because of the cognitive limitations that lead people to overvalue their own viewpoint. It's only by getting opposing viewpoints that, collectively, we can hope to be more rational and be better able to seek the truth than any of us can do individually.
A diversity of skin colour or a diversity of chromosomes is no guarantee of better science, because people of a given ethnicity or of a given sex don't all think alike. If we had fair criteria to pick the best scientists and the best science, that would ideally be the ultimate way of reducing discrimination, because it would zero in on quality, ignoring irrelevant criteria such as skin colour or sex.