I'm not in Blackburn's head so I'll not speak for her. Neither side is against allowing those that want to compete, to compete. One side believes women's competition is the appropriate place for these XY anomalies (allow me the flexibility to use that term, but I'm open to whatever you or any others want to use) to compete. The other side believes doing so presents an unfair advantage to XX athletes. We shouldn't conflate the desire to protect women's athletes and women's sports as being any more than just that.