This is pseudo-academic posturing nonsense. The issue people take is attributing value to the differences between sexes, not the biological differences in themselves.
You aren't looking hard enough if you don't believe people will flat out deny that biological differences exist between male and female cognition and neurobiology.
Sure, you can also find people who believe the Earth is flat... but the point is that they're not the majority.
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).