Of course men and women are different, duh. The problem isn't that premise. The problem is the arguments people make from it.
You get the feeling that there are these legions of people that assume that liberals are in favor of diversity programs because liberals believe men and women are the same. And then these legions of people point to a study that shows men and women aren't the same, and then they feel, "A-ha! Take that, liberals!" It's completely mystifying to me.
We're not in favor of diversity programs because of a belief that men and women are the same. We're in favor of diversity programs because we know that people will use these differences as excuses to discriminate against women. This is not hard to understand!