Why is it extremely unlikely? They don't break out the Hamas casualties, which is very likely a large percentage of them given they are who Israel is targeting, and they've been videotaped staging live women and children as casualties. They have a history of it. Dead women and children get sympathy, dead terrorists don't get much. So yes, I think the number of women and children deaths are being inflated, and probably pretty significantly.
Civilian deaths are unavoidable when Hamas likes to fight from schools, hospitals and areas surrounded by civilian non-combatants. They try to avoid those casualties like we do as well, but it's not possible to avoid them completely.