When you have a homogeneous group of people (in this case, scientists) addressing problems or questions and experimenting with answers and solutions, your chances of someone having the right combination of knowledge, skills, and background increase as your workforce diversity increases.
This makes me think of that one example where people wondered how women in previous civilizations got their hair into big intricate styles and it took a woman to tell all the male historians "they sewed their hair". Or how male historians will ponder an artifacts use, and female historian will quickly identify it as a crochet or knitting tool.
