I don't think the people who design houses in The Sims have ever played the game. It never makes any sense. Maybe I have too much of an imagination, but sim houses are designed almost like a punishment. The supervisor in charge of having out designing assignment doesn't like a designer, so they make them design houses.
Plus the fact the Maxis doesn't care about The Sims players to begin with, but expects us to pay for overpriced overglitchy games when they come out.