What makes someone's opinion particularly valuable when that someone's a woman or not white? They might have different life experiences and perspectives on day

What makes someone's opinion particularly valuable when that someone's a woman or not white? They might have different life experiences and perspectives on day to day life compared to a white male, but sex or race has zero relevance to knowledge-based fields. The opinion of someone anonymous is probably very close to their true opinion. The opinion of non-anonymous users on Twitter is almost certainly censored.