#18: The Shoemaker’s Son Goes Barefoot
I don’t know if there’s an equivalent metaphor in English, but in some languages, this is a popular phrase indicating that someone is not looking after themselves or their own as much as they look after others. In this case, the shoemaker [or sock-seller, to be more precise] is indeed barefoot.

provided by constative.com
When you choose a picture to promote your product, surely you ask yourself all kinds of questions. What angle should I shoot my product from? What can I do to make it look the best it can be? Here, they seemed overwhelmed by the questions and decided to abandon the product entirely.
