Are there no builders that also thoroughly play in their creations?

Sometimes it's a little irritating to see that people use MOO to clutter shelves even though there's plenty of Decorated shelves already in Clutter. And most clutter can indeed be walked through.

Most of the time you only need to sit at a computer, work at an easel, reach a bookshelf, climb into a bed, so it's irritating that creators don't even test that much.