There is nothing wrong in having a spot on the chin, a pale look or other somatic peculiarities. We are how we are. Full stop.
Of course, everybody has the right to self-retouch his appearance (what does aesthetic-surgery is for?) but that should be a personal (and non-questionable) choice.
In contrast, supporting the idea that a kid’s photo should be photoshopped to have him look better is just plain wrong. It inculcates into kids’ minds that they have something “wrong” and, therefore, that they ARE “wrong”.
Leave kids shine for the beauty of their age, and leave photoretouching, make up and surgery to “growth” adults who forgot what really matter.