CAR your logic is starting to get a bit convoluted here.
People buying in the areas with the best locations, weather, schools, etc. that are paying 20-30% down likely have enough cash to buy in 99% of the country yet they choose not to because they want the best of everything and have the incomes to afford it at these price points and interest rate levels. Prices in Oceanside, Escondido, etc. don’t matter to these buyers because they likely would not live there if someone gave them a house. If people are buying in topflight areas and putting down a large chunk of their own money then the value is there for them. As far as the government “stalling” deflation in the mid-high to high ends I respectively disagree. You yourself have provided some evidence on this board to the contrary.
I also think you are putting too much emphasis on this idea that every area in San Diego country should have the same relative value as it did 20 years ago. As time marches on some areas shine and others wither.