I daresay this kid will grow up with that confidence as well. The normalcy they're speaking about is likely normal human interactions with other children his age.
A friend of the Culkin family recounted in an interview how people would stare at the young Macaulay Culkin on the street, and the actor himself has expressed a desire to have had a more 'normal' life.
The normal they want for their child is unlikely to involve suppression of his creativity, and is likely to involve supporting him as he deals with his fame and his peers' reaction to it.
