This is pseudo-academic posturing nonsense. The issue people take is attributing value to the differences between sexes, not the biological differences in themselves.
Not many people would argue that testosterone causes men to have increased muscle mass, for example. But they might take issue if you make the claim that men are physically superior (because that concept is much more complex and it's weird to declare superiority without more specific constraints — It's akin to saying America is the best country).