Btw, I’m not buying the site you provided used to calculate state taxes. But lets assume it’s correct.
And lets says they got 2 people working full time are bringing home 50k, assuming they’re combined 60k income they will only be taxed about 10k per year in CA according to you.
How are they going to afford the typical half million dollar home on 50k? You seem to be good at numbers, do them. And be sure and throw in all the health insurance, food, utilities, repairs, et al.
Assuming 10% down, you're probably looking at $30-$35k all in housing cost including utilities/taxes/insurance at $500k properties per year, which would be very difficult to swing for most families, but would be possible.