Actually, this makes quite a bit of sense. Women are capable of far more savagery than men. I believe this is probably a more accurate depiction Fielding’s novel than a bunch of la-di-da boys.
"WOMEN" ?
The book is about boys from around the age of 6 to 12 or 13.
They are well educated, well looked after, very privileged ( except for Piggy ), used to VERY structured lives, who are, all of a sudden, set adrift...sans, parents, sans teachers, sans rules, sans safety, and it all takes place in the 1940s or early 1950s!
If this gets transposed to today, with little girls, and we're supposed to believe ( if the story line follows the book )that today's girls would know about parliamentary procedures, Robert's Rules, spear fishing and/or hunting, devolve into a wild, tribal ( along with face painting ) savages, with only one of them "soft" enough to worry and/or take care of the little ones, that's way beyond anything believable! And besides which, it just isn't going to work in any way at all.