In system architecture, there’s entire fields of research exploring ways to expand the space from which we pick our solutions. It is not about variety of opinions but about a variety of ways of thinking about problems. More options means more creativity, more chances of a novel approach, better chances of standing out. Having a culturally (gender, race, native language, education, age, you name it) diverse team is a really efficient way to gain that. So diversity of perspective is directly financially beneficial for certain organizations.