It is strange that you claim you cannot imagine how selling a primary residence sooner than expected increases the number of houses being sold, but you do have

It is strange that you claim you cannot imagine how selling a primary residence sooner than expected increases the number of houses being sold, but you do have the imagination to pretend an agent is working full time for single clients in 30-45 day stretches to ensure they get what they want (despite misaligned incentives to do so). And that they "often" spend a year on this.