True, there is a “frictional” effect on occupancy rate, that causes property to be idle for some time. I’m about to buy a house that was built by somebody else, but they decided they couldn’t afford it, and backed out, so it’s been sitting there new & idle for a couple of months.
When there is a lot of economic dislocation, or major demographic changes, that frictional rate of idle property may spike up (e.g. in the wake of the 2008 recession/real estate bubble, when some owners decided they would rather wait for recovery than find a buyer at a huge discount), but it’s a transient effect.