Many boats built during the wing keel fad era had rudders that were lower in the water than the keel. Grounding one of those could be a disaster. Boat designs are often just to enhance sales and not for a practical purpose. So if the current fad is for wings, wings you get. If windows on the hull like catamarans have, windows you get. Giant cabins, with flowers in vases, appeal to the ladies at boat shows...