Board of supervisors are not judges. If the city wants to void the sale, the owner can sue the city and the HOA in the court. Some judges are bad loose activists, but the owner can go all the way to the Supreme Court.
This HOA had past residents of Pelosi and Feinstein. Let’s see whether this couple has the gut and money to go the legal route. I think this case should be taken by a non profit organization and you guys can donate some for the justice. It’s an intersting case and attention grabbing, but no political significance. If I’m a lawyer, I may take the case for free for the sole purpose of media coverage.