You must
be a rich family to afford a home in a good school district. As your children perform well in school, the school rankings get better and the housing gets more valuable. These self-reinforcing pockets of wealth are great for those on the inside of the virtuous cycle, but further segregate them from those on the outside.
Decoupling property values from school quality has a lot of liberal appeal. SFUSD does it. Unfortunately, SFUSD's experiment has largely failed because parents who draw bad schools in the lottery system opt out and move to the East Bay, where they can reliably buy their way into good school districts.
(If they stayed, their children would likely turn those bad schools into good schools, or at least okay schools).
Privatizing education wouldn't remove school quality as a function of wealth, but it would let you pay directly for school quality, and disentangle it from the real estate market.