it's not where you start, it's where you are in your 30s, particularly when you start thinking about starting a family or owning a home. This is a very expensive place to live, and having 1-2 roommates and still paying $1200-$1600 a month gets old.
if you want to have 2 kids, you're staring at a $600k+ condo, or a $1mm+ house; 2 cars; and daycare so you can both work. Plus 9% CA income tax. Oh, and if you ever want to retire, you're going to pay the state $1200/mo of rent just to be allowed to continue to live in the home you fully own (ps: don't take this the wrong way, I understand the state needs money, but $20k+ a year between property tax, insurance, utilities, and a handful of repairs is hard to budget into retirement.)
A couple I'm friends with just left to move back to MI. One was a developer with a masters from a top 10, making $140k. The partner was an account manager and made $90k, for a total of $230. The engineer took a paycut to $105 and the partner took a paycut to $60, for a total of $165. However, you can buy a pretty nice home for $350k; they live near family to help with daycare (saying $400/week for infant childcare); and taxes are lower. It's a much better deal for them. And again, to own a home, they need $100k+ as a downpayment and still have a housing/income ratio of 600/230 for a condo and 1100/230 = 4.8 for a detached house. Compare to MI where they have a housing/income ratio of 350/165 of 2.1. That makes an enormous difference in your financial lives, particularly as you think about savings, retirement, paying for college, etc.
So there is no "should" here. It's what do people need to be paid to live in an insane housing market with a busted ass public transport system, when there are far cheaper deals available elsewhere.