Fortunately little skulls are much more pliable, which may have made the difference. But yes he was lucky and it is a wonder that as many children, boys and girls, manage to make it to adulthood. Boys are worse for sure, but girls can often be nearly as bad. Especially if they have a slightly old brother sibling who they compete with.
My young granddaughter was always trying to do what her older brother, by a little more than a year, did.