Why deliberately avoid matching cabinets and kitchen furniture?

One thing I like about the Animal Crossing series is how the game has designed furniture that match a series of items that all cleanly mesh into each other and are built for each other; if you want a particular series of items with a theme, you can easily find them as they all share a common name. I'd love to see something like that for the Sims. I know that there are some series of items already such as the Schmapple stuff, but I'd like to see further expansion on that.