This has always been a problem, the vanilla game had this huge obnoxious fantasy archway that is completely useless in most cases, but it had beautiful curvy pillars stuck to them. One of the free updates finally added some flags, but instead of a nice single triangular flag, someone thought it was the right decision to bake six of em right into one prop. Studios had cute little window lights and nicely modeled doors, all baked into one prefab wall piece. And World's Fair is icing the cake, from tons of prefab wall pieces to that beautiful Moroccan vase that has a (equally beautiful) plant glued to it.
They apparently don't get the hint, just give it up.