Except that working at a no-name software shop will pay significantly better, and then you can take your SF developer experience to middle America and get decent paying corporate job and a McMansion.
I think you underestimate the amount of money that Bay Area developers make. $2k/month is $24K/year, which is a relatively small fraction of your after-tax income when you're making $150K/year.
One thing people don't take into account when figuring out cost-of-living adjustments: while expenses like rent, taxes, and meals out are typically a percentage of income, expenses like durable consumer goods and savings are measured in absolute dollars, and are fungible between locations. So while it sucks that cost-of-living might still eat up 80% of your income, the remaining 20% is a measly $8k/year at a $40K/year middle-America programmer job, but $30K/year at a $150K/year Bay Area tech job.
And the difference gets even more stark with added income - if you make $300K/year (quite doable as a senior engineer at a major tech company in the Bay Area), your taxes go up, but every other expense category remains the same, and so you end up banking about $100K/year. It's not unreasonable for a programmer in the Bay Area to save up half a million over a 4-5 year stint at a company; ask someone in Kansas or Ohio how long they think they'll have to work to save up half a million.
Fresh-out-of-school salaries at Google/Facebook/Twitter are in the low six figures (2 years ago I think they were around $105K), get promoted to senior dev after 2-3 years and $150K/year is very doable. It's probably lower at J-random-startup that nobody has ever heard of, but most VC-funded startups will pay market rates.
We are comparing to acting hopefuls. Is the crem-de-la-crem of the programming world- the ones that get top salaries at Google/Facebook/Twitter- really the right people to compare?
300K for a senior engineer? Maybe a few people at Google. I've heard of some 200K jobs at Apple for low level systems programming people that are hard to find.