what exactly are they supposed to accomplish?
Are you a 4 year old girl? No? Well then why would you understand?
Our little girl (as I suspect all kids do) loves to mimic the things that mum and dad do. She does laundry, pumps up the tires on my bike, shouts and swears when she drops things 😳 and so on. She has not yet been taught that there’s anything wrong or weird about willies and boobies.
When she sees Mrs Grips feeding our new baby (if all goes well) then I am sure we’ll see her feeding her dolls too.
Note that she has dolls, cars, houses, planes, phones and all, and plays with them all equally. She has also not yet been taught that some things are for boys and some for girls.