What are parents going to do, call their child "the child" until a name is self-selected? And all the while, their child is getting used to being referred to and called "the child", and has to completely get used to a name instead of being accustomed to it from the time they first learn to talk?

In many societies you have a given name and a chosen name. In most, if the kid has a nickname they like, they end up going by that nickname.