
You are just making this up as you go along. I can disprove your theory by the animal living in my house: cats live solitary lives and therefore do not divide tasks between genders. The idea that females primarily take care of children makes no sense since in most species (incl. most mammals) kids grow up pretty quickly. In most animals there is no sharp distinction of tasks between males and females.
You seem to misunderstand me (deliberately??). Obviously female cats carry and nurse the young, but they also hunt, protect their territory etc (I.e. all the tasks you ascribed to males in your previous posts), because they live solitary.