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To me a separate category just feels like a separate water fountain or seating area at a diner.

What makes the difference between the people at varying levels in their sports? Seems like it's the sum of genetics and training. There's always been people who can achieve more because of their genes. There's always been people who can achieve more because of their access to training (can do it full time, better coaches, better facilities, whatever). Isn't a trans woman just coming to their supposed advantage via a different route than what we're used to?

Was there ever a time when there was a desire to have different categories based on race because people of one race had an advantage?