This is far from true. Aside from Valley pay, which also has Valley housing costs, a "tech job" will barely pay for healthcare and housing for one, much less healthcare and housing for four.

Median dev salary in USA is $133k, most likely with healthcare already. You can easily afford a mortgage on a median home which is about $24k/yr.

https://www.bls.gov/ooh/computer-and-information-technology/...

https://www.zillow.com/home-values/102001/united-states/

https://www.calculator.net/mortgage-calculator.html?chousepr...