When clearing traffic, you get the people out of the way before you start moving cars. When cleaning a room, you move books and boxes and bagged garbage before you start rearranging furniture. You sweep dust off a floor before you mop, you clear the dried mud off dirty boots before you get the brush and cleaning solution, and in general you prioritize the lower-effort processes over any individual item that requires special equipment or multiple people to handle. Small things are easier and faster to deal with in a closed system. It's one thing if the bigger stuff is preventing you from dealing with the smaller stuff, but it's not hard to understand why you don't want loose splinters around while you're moving things big enough to impede vision or mobility.