More like "something something programming restrictions". They seem to have coded everything into strict, inflexible, single categories that can't overlap, and seem unlikely to change it (if they even can).

With the introduction of lofts, it does seem likely that more things will be labelled "tabletop" for functionality, but it will seem very strange to a newcomer that so many large furniture pieces are labelled that way!

Also I think Mikki might be incorrect about not being able to place tabletop items on other tabletop items? The 'wooden showcase' is tabletop, but its shelves are functional.