Long ago, when many babies died because the lack of medical supports they used to name their new born babies as like not precious thing at all. Since they believed that if they gave their baby a good name then the evil spirits might take the babies lives away.
That's why Koreans celebrate a baby's 1st birthday as a big ceremony of whole family.
In same reason, that might be true what you've said somewhere in time though,
not so common thinking these days however.
Actually I've never heard that kind of things before.