It's one thing to notice differences, it's completely another to attribute specific phenomena to them based on these lay observations. I mean, in recent memory, the "basic common sense" consensus was that women were not capable of owning property or voting because of these observed differences.
And I mean do I even need to point out that "cattiness" is not exactly a well-attested psychological axis in use by reputable professionals? This is simple straightforward misogyny. They adequately laundered it through a thesaurus to HN standards when pressed but the underlying attitude is just crusty old sexism.