Those ‘shaped like feet’ duck shoes are a niche product and a fad, like the Vibram toe shoes were at one point. A number of small niche brands make ‘shaped like feet’ shoes (at least one of them makes one that was intended for skating), and major footwear brands would start making them too if they became popular enough to justify it. Currently, most people don’t want shoes like that, so big brands who want to sell as many shoes as possible, don’t make them.