Granted, this threshold is less than $10M, but it isn't orders of magnitude less
All of which is to say that it is basically impossible to stay in the Bay long-term unless you make an absolute fuckton of money.
Well, you do have two other options.
One is to commute in 2hr or more every day. Which a lot of service workers have to do.
The other is to share a house or apartment with roommates (if you're single) or with another family (surprisingly common, because what else can you do?).
These are both lifestyle decisions that differ substantially from what most people think of as "normal", past your 20s.
What I'm saying is, merely living a "normal middle class" lifestyle in the Bay requires absurd money. So I can understand why people act like absurd money is normal.