Updated
People inspect shoes more closely than clothes. They want the sole tread, the stitching, the shape of the toe and how the pair looks on a foot before they choose a size. A single side view rarely answers enough to win the sale.
Shoes are also paired products with a lot of colourways. Every pair needs the same set of angles in the same light, and each new colour has to match the ones already listed, or the range looks stitched together from different shoots.