Perhaps well said, but presented without evidence or even any attempt at a persuasive argument.
It's not at all clear to me that one should buy a house in SF at this point in time regardless of one's expectations for staying.
It's a crazy market. Do you want to go all-in on up to 500% of your net worth given the market is quite obviously not in equilibrium? The odds are against you getting some great deal here, and there's a very good chance you'll lose several (5-10?) years of accumulated earnings. Leverage goes both ways </rant>