No, in your own answer you pointed out the cause: "low interest rates in order to help keep housing priced up".
That is literally the cause.
NIMBYISM cannot be a 'cause' of anything - there is always more demand than supply in SF and in many places (also - people have a right to manage their own communities as they see fit.)
If a million people try move to a village, the price of the houses goes up - the cause is 'zoning'? Or is the 'cause' the the people trying to move into the village? (Propped up with huge leverage due to ever decreasing interest rates?)
That is literally the cause.
NIMBYISM cannot be a 'cause' of anything - there is always more demand than supply in SF and in many places (also - people have a right to manage their own communities as they see fit.)
If a million people try move to a village, the price of the houses goes up - the cause is 'zoning'? Or is the 'cause' the the people trying to move into the village? (Propped up with huge leverage due to ever decreasing interest rates?)