I agree that boys and girls are different. At the same time, there are studies that show adults treating babies differently based on whether the dress the same baby in pink or blue. I pointed out these studies to show how our traditional views of gender are reinforced by society. That doesn’t mean I’m saying girls should play in the NFL.
I’m not sure why you reacted so strongly to the phrase “Gender behavior is reinforced almost from birth.” How would you rewrite that sentence, based on the study I was talking about?