(It's also significantly more reasonable in the South Bay - my family pays about $2650/month for a 2BR, and most of the fat Facebook/Apple/Netflix/Google salaries are in Silicon Valley proper.)
Much better for those who can arguably restructure their salary as business income (e.g., real estate developers, some contractors), then they only get a 15% tax. Far worse for those who cant make that argument and live in high tax states like NY, CA, and many others.
https://www.irs.gov/taxtopics/tc751
50% is a high estimate, good for budgeting though. With property taxes, vehicle registration fees (aka taxes), school fundraising (aka taxes), tolls (also tax), health insurance (a tax if it’s mandatory), and other fees for dealing with government, you get pretty close to 50%.
The only way to beat this is to make a significant portion of your income via capital gains, that’s one big advantage of the real estate business, various loopholes exist to let you minimize taxes (like 1031 exchanges) on increases in your net worth.
That's not really true. Restaurants are more expensive in the Bay Area. Fresh produce is not, if you know where to shop - actually, when I go basically anywhere else in the world, one of the things I miss is the ability to fill a whole shopping bag with 10-15 lbs. of vegetables for < $10. Gas is more expensive, largely because of taxes. Cars are not. Durable goods cost the same as everywhere else. Amazon charges the same (modulo taxes) regardless of where you live. Airline tickets don't have appreciable differences. Baby things (modulo housing and childcare) are cheaper, because the Bay Area is dense enough and tech savvy enough that you can get a lot of toys/cribs/strollers/mats/gates/playthings for free or cheap on NextDoor/Craigslist. A dollar of savings is the same in SF as in Alabama.
The point about tax rates is true for rentals. You can do the math yourself on whatever offer you happen to get - figure on housing in SF being ~$40K/year, meals out costing about $20/person, grocery food being about the same, public transportation being a few dollars a trip, and gas being negligible because you'd have to be pretty crazy to want to drive (and park) in SF.
For that matter, the higher home prices also come back to you if you choose to move elsewhere (as long as Bay Area real estate doesn't crash). A number of the homes I've been looking at are on the market because the kids are grown, the owners are retired, and now they want to take their $1.3-$2.4M and move to Nevada/Florida/Arizona or some other low-COL area.
If saving $30k in Chicago lets you sustain your lifestyle for 12 months of unemployment, and saving $30k in San Francisco gives you the option to leave everyone you know and move 2200 miles to Chicago for 12 months of unemployment, those dollars of savings are not at all the same in terms of the protection they offer.
Living in the Bay Area can be a good deal, but to figure out whether that's the case, you need to set savings targets in terms of equivalent capabilities. Different people can place higher and lower value on location stability, but in any case the value is not $0; moving trucks and realtors are not free.