An interesting article, but I would quibble one sentence. 

"But sexism isn't the result of knowing facts; it's the result of what people choose to do with them."

Making decisions based on data, isn't sexism. 

The old example of, is it bigoted that only very tall people play in the NBA. The answer is no, they are just the best suited for the position/task. 

If males/females are physically or psychologically less suited to a task then how is it sexist to act based on that info? 

If a woman for example wishes to be a firefigther and can pass the physical requirements a man would have to then fine. However if they have to reduce the standards for her to become on then that is sexism, and potentially grounds for manslaughter charges in the future. 

Continuing to indulge the delusional thinking of large portions of the society when it comes to sexual Dimorphisme is not helping anyone in the mid to long Term.