Recording all of these would likely take up more memory space than we have. Secondly, faces never look the same from day to day. People change hairstyles, put on makeup, age, and we see faces from different angles. If we stored an actual image of faces we would likely not be able to recognize them when needed. Most likely you have parsed many visual representations over the years into geons.
Faces have general attributes such as eyes, nose, mouth and hairstyle.
It makes more sense to store variations of these features for both general recognition of faces and specific recognition of faces we know. When we remember a new face we know which geons to pay attention to for efficient encoding. This leads to focus of scene. When processing a visual image there is always a focus of attention. When recognizing faces humans pay attention to the eyes, mouth, hair and nose geons.